add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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nvkm-y += nvkm/subdev/mxm/base.o
nvkm-y += nvkm/subdev/mxm/mxms.o
nvkm-y += nvkm/subdev/mxm/nv50.o