add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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DB_88F6820_GP BOARD
M:    Stefan Roese <sr@denx.de>
S:    Maintained
F:    board/Marvell/db-88f6820-gp/
F:    include/configs/db-88f6820-gp.h
F:    configs/db-88f6820-gp_defconfig