Add include guards to some headers

Marlin/src/HAL/HAL_DUE/G2_PWM.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * This module is stripped down version of the LPC1768_PWM.h file from

Marlin/src/HAL/HAL_DUE/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test Arduino Due specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_ESP32/FlushableHardwareSerial.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 #ifdef ARDUINO_ARCH_ESP32
 

Marlin/src/HAL/HAL_ESP32/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 #if ENABLED(EMERGENCY_PARSER)
   #error "EMERGENCY_PARSER is not yet implemented for ESP32. Disable EMERGENCY_PARSER to continue."

Marlin/src/HAL/HAL_ESP32/servotimers.h

@@ -19,3 +19,4 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once

Marlin/src/HAL/HAL_LINUX/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test X86_64-specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_LPC1768/HAL_Servo_LPC1768.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * servo.h - Interrupt driven Servo library for Arduino using 16 bit timers- Version 2

Marlin/src/HAL/HAL_LPC1768/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test LPC176x-specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_LPC1768/include/SPI.h

@@ -19,7 +19,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
 #pragma once
 
 #include "../../shared/HAL_SPI.h"

Marlin/src/HAL/HAL_LPC1768/persistent_store_api.h

@@ -19,6 +19,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
+
 #include "../shared/persistent_store_api.h"
 
 #define FLASH_EEPROM_EMULATION

Marlin/src/HAL/HAL_LPC1768/u8g/HAL_LCD_I2C_routines.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 void u8g_i2c_init(uint8_t options);
 uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);

Marlin/src/HAL/HAL_LPC1768/u8g/HAL_LCD_defines.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * LPC1768 LCD-specific defines

Marlin/src/HAL/HAL_LPC1768/u8g/HAL_LCD_delay.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * LCD delay routines - used by all the drivers.

Marlin/src/HAL/HAL_LPC1768/u8g/HAL_LCD_pin_routines.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Low level pin manipulation routines - used by all the drivers.

Marlin/src/HAL/HAL_STM32F1/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test STM32F1-specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_STM32F4/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test STM32F4-specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_STM32F7/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test STM32F7-specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_TEENSY31_32/HAL_Servo_Teensy.h

@@ -19,7 +19,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
 #pragma once
 
 #include <Servo.h>

Marlin/src/HAL/HAL_TEENSY31_32/HAL_timers_Teensy.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Description: HAL for

Marlin/src/HAL/HAL_TEENSY31_32/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test TEENSY35_36 specific configuration values for errors at compile-time.

Marlin/src/HAL/HAL_TEENSY31_32/endstop_interrupts.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Endstop Interrupts

Marlin/src/HAL/HAL_TEENSY31_32/fastio_Teensy.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Fast I/O Routines for Teensy 3.5 and Teensy 3.6

Marlin/src/HAL/HAL_TEENSY31_32/spi_pins.h

@@ -19,7 +19,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
 #pragma once
 
 #define SCK_PIN   13

Marlin/src/HAL/HAL_TEENSY31_32/watchdog_Teensy.h

@@ -19,7 +19,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
 #pragma once
 
 #include "HAL.h"

Marlin/src/HAL/HAL_TEENSY35_36/SanityCheck.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * Test TEENSY35_36 specific configuration values for errors at compile-time.

Marlin/src/HAL/shared/servo.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
  * servo.h - Interrupt driven Servo library for Arduino using 16 bit timers- Version 2