add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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if BOARD_SFR_NB4_SER
 
config SYS_BOARD
    default "nb4_ser"
 
config SYS_VENDOR
    default "sfr"
 
config SYS_CONFIG_NAME
    default "sfr_nb4_ser"
 
endif