Make default layer size 16-bit (#15286)

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

keyboards/gh60/revc/keymaps/dbroqua/keymap.c

@@ -101,7 +101,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 };
 
 void matrix_scan_user(void) {
-    uint32_t layer = layer_state;
+    layer_state_t layer = layer_state;
 
     if (layer & (1<<1)) {
         gh60_fn_led_on();
@@ -120,4 +120,4 @@ void matrix_scan_user(void) {
     } else {
         gh60_esc_led_off();
     }
-};
+};