Add SCL/SDA pin definition for stm32f411ce_blackpill

Author: djix123

ports/stm/boards/stm32f411ce_blackpill/pins.c

@@ -35,5 +35,8 @@ STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_C14), MP_ROM_PTR(&pin_PC14) },
     { MP_ROM_QSTR(MP_QSTR_C13), MP_ROM_PTR(&pin_PC13) },
     { MP_ROM_QSTR(MP_QSTR_LED), MP_ROM_PTR(&pin_PC13) },
+
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_PB07) },
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_PB06) },
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);