add additional pin aliases

Author: tannewt

ports/atmel-samd/boards/hallowing_m4_express/pins.c

@@ -33,10 +33,15 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_PB16) },
     { MP_ROM_QSTR(MP_QSTR_D8), MP_ROM_PTR(&pin_PB16) },
     { MP_ROM_QSTR(MP_QSTR_VOLTAGE_MONITOR), MP_ROM_PTR(&pin_PB01) },
+    { MP_ROM_QSTR(MP_QSTR_A6), MP_ROM_PTR(&pin_PB01) },
     { MP_ROM_QSTR(MP_QSTR_BATTERY), MP_ROM_PTR(&pin_PB01) },
 
+    { MP_ROM_QSTR(MP_QSTR_D3), MP_ROM_PTR(&pin_PB02) },
     { MP_ROM_QSTR(MP_QSTR_EXTERNAL_NEOPIXEL), MP_ROM_PTR(&pin_PB02) },
+    { MP_ROM_QSTR(MP_QSTR_A9), MP_ROM_PTR(&pin_PB02) },
+    { MP_ROM_QSTR(MP_QSTR_D2), MP_ROM_PTR(&pin_PB03) },
     { MP_ROM_QSTR(MP_QSTR_SENSE), MP_ROM_PTR(&pin_PB03) },
+    { MP_ROM_QSTR(MP_QSTR_A8), MP_ROM_PTR(&pin_PB03) },
 
     { MP_ROM_QSTR(MP_QSTR_SPEAKER_ENABLE), MP_ROM_PTR(&pin_PB05) },
     { MP_ROM_QSTR(MP_QSTR_CAP_PIN), MP_ROM_PTR(&pin_PA15) },