add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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POPMETAL-RK3288
M:    Lin Huang <hl@rock-chips.com>
S:    Maintained
F:    board/chipspark/popmetal_rk3288
F:    include/configs/popmetal_rk3288.h
F:    configs/popmetal-rk3288_defconfig