Merge pull request #4889 from kattni/slider-trinkey-add-a0

Add A0 as alias to potentiometer pin.

Author: dhalbert

ports/atmel-samd/boards/adafruit_slide_trinkey_m0/pins.c

@@ -2,7 +2,10 @@
 
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_PA04) },
+
     { MP_ROM_QSTR(MP_QSTR_POTENTIOMETER), MP_ROM_PTR(&pin_PA02) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
+
     { MP_ROM_QSTR(MP_QSTR_TOUCH), MP_ROM_PTR(&pin_PA07) },
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);