HAL include and other adjustments (#14525)

Marlin/src/HAL/HAL.h

@@ -0,0 +1,54 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#ifdef __AVR__
+  #define HAL_PLATFORM HAL_AVR
+#elif defined(ARDUINO_ARCH_SAM)
+  #define HAL_PLATFORM HAL_DUE
+#elif defined(__MK20DX256__)
+  #define HAL_PLATFORM HAL_TEENSY31_32
+#elif defined(__MK64FX512__) || defined(__MK66FX1M0__)
+  #define HAL_PLATFORM HAL_TEENSY35_36
+#elif defined(TARGET_LPC1768)
+  #define HAL_PLATFORM HAL_LPC1768
+#elif defined(__STM32F1__) || defined(TARGET_STM32F1)
+  #define HAL_PLATFORM HAL_STM32F1
+#elif defined(STM32GENERIC) && defined(STM32F4)
+  #define HAL_PLATFORM HAL_STM32F4
+#elif defined(STM32GENERIC) && defined(STM32F7)
+  #define HAL_PLATFORM HAL_STM32F7
+#elif defined(ARDUINO_ARCH_STM32)
+  #define HAL_PLATFORM HAL_STM32
+#elif defined(ARDUINO_ARCH_ESP32)
+  #define HAL_PLATFORM HAL_ESP32
+#elif defined(__PLAT_LINUX__)
+  #define HAL_PLATFORM HAL_LINUX
+#else
+  #error "Unsupported Platform!"
+#endif
+
+#define XSTR_(M) #M
+#define XSTR(M) XSTR_(M)
+#define HAL_PATH(PATH, NAME) XSTR(PATH/HAL_PLATFORM/NAME)
+
+#include HAL_PATH(.,HAL.h)