drm/amd/amdgpu: disable MMHUB PG for navi10

Disable MMHUB PG for navi10 according to the production requirement.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -552,7 +552,6 @@ static int nv_common_early_init(void *handle)
 			AMD_CG_SUPPORT_BIF_LS;
 		adev->pg_flags = AMD_PG_SUPPORT_VCN |
 			AMD_PG_SUPPORT_VCN_DPG |
-			AMD_PG_SUPPORT_MMHUB |
 			AMD_PG_SUPPORT_ATHUB;
 		adev->external_rev_id = adev->rev_id + 0x1;
 		break;