MichaelZhuxx 048f63f3e8 add SPDX license header to all the files with StarFive copyright 2 vuotta sitten
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uart.c 048f63f3e8 add SPDX license header to all the files with StarFive copyright 2 vuotta sitten
uart.h 048f63f3e8 add SPDX license header to all the files with StarFive copyright 2 vuotta sitten