drm/amd/include:cleanup vega10 mmhub header files.

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c

drivers/gpu/drm/amd/amdgpu/vce_v4_0.c

...rs/gpu/drm/amd/include/asic_reg/mmhub/mmhub_1_0_default.h

...ers/gpu/drm/amd/include/asic_reg/mmhub/mmhub_1_0_offset.h

...rs/gpu/drm/amd/include/asic_reg/mmhub/mmhub_1_0_sh_mask.h