AL1 Unable to Compile on Configurator (#3339)

* use QMK_KEYBOARD_H

* init_kb and scan_kb need to be in matrix.c to make use of the matrix.h include

* Make the routines weak as suggested by Drashna

keyboards/al1/keymaps/splitbs/keymap.c

@@ -1,4 +1,4 @@
-#include "al1.h"
+#include QMK_KEYBOARD_H
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 	[0] = LAYOUT_split_bs(\
@@ -49,4 +49,4 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 
 void led_set_user(uint8_t usb_led) {
 
-}
+}