Add include guards to some headers

Marlin/src/lcd/dogm/HAL_LCD_com_defines.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 // Use this file to select the com driver for device drivers that are NOT in the U8G library
 

Marlin/src/lcd/dogm/dogm_Bootscreen.h

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

Marlin/src/lcd/dogm/dogm_Statusscreen.h

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

Marlin/src/lcd/dogm/fontdata/fontdata_6x9_marlin.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 /**
   Fontname: -Misc-Fixed-Medium-R-Normal--9-90-75-75-C-60-ISO10646-1

Marlin/src/lcd/dogm/ultralcd_DOGM.h

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

Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.h

@@ -19,6 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
+#pragma once
 
 // NOTE - the HAL version of the rrd device uses a generic ST7920 device.  See the
 // file u8g_dev_st7920_128x64_HAL.cpp for the HAL version.

Marlin/src/lcd/extensible_ui/ui_api.h

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

Marlin/src/lcd/thermistornames.h

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