Merge pull request #5162 from rpavlik/patch-1

cp_sapling_m0_revb: board.UART not board.uart

Author: gamblor21

ports/atmel-samd/boards/cp_sapling_m0_revb/pins.c

@@ -49,6 +49,6 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
     { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
-    { MP_ROM_QSTR(MP_QSTR_uart), MP_ROM_PTR(&board_uart_obj) },
+    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);