add ch343 driver

hc

2023-07-06 0d92c6001e626cf3cfa86b826ccc10a16115901e

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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