drm/amdgpu: enable gfx clock gating and power gating for vangogh

This patch is to enable the gfx cg and pg for vangogh.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -884,8 +884,11 @@ static int nv_common_early_init(void *handle)
 		break;
 
 	case CHIP_VANGOGH:
-		adev->cg_flags = 0;
-		adev->pg_flags = 0;
+		adev->cg_flags = AMD_CG_SUPPORT_GFX_CGCG |
+			AMD_CG_SUPPORT_GFX_CGLS |
+			AMD_CG_SUPPORT_GFX_3D_CGCG |
+			AMD_CG_SUPPORT_GFX_3D_CGLS;
+		adev->pg_flags = AMD_PG_SUPPORT_GFX_PG;
 		adev->external_rev_id = adev->rev_id + 0x01;
 		break;
 	default: