Shorter paths to HAL, ExtUI (#17156)

Marlin/src/HAL/STM32F1/pinsDebug.h

@@ -0,0 +1,27 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * 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 NUM_DIGITAL_PINS             // Only in ST's Arduino core (STM32duino, STM32Core)
+  #include "../STM32/pinsDebug_STM32duino.h"
+#elif defined(BOARD_NR_GPIO_PINS)   // Only in STM32GENERIC (Maple)
+  #include "../STM32/pinsDebug_STM32GENERIC.h"
+#else
+  #error "M43 not supported for this board"
+#endif