drm/amd/powerplay: enable vcn powergating v2

enable vcn powergating in driver for navi10

v2: set vcn pg bit according to AMD_PG_SUPPORT_VCN flag
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -275,6 +275,9 @@ navi10_get_allowed_feature_mask(struct smu_context *smu,
 		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_GFX_SS_BIT)
 				| FEATURE_MASK(FEATURE_GFXOFF_BIT);
 
+	if (smu->adev->pg_flags & AMD_PG_SUPPORT_VCN)
+		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_VCN_PG_BIT);
+
 	return 0;
 }