drm/amdgpu: add GFX_PIPELINE capacity check for updating gfx cgpg

Before disable gfx pipeline power gating need check the flag AMD_PG_SUPPORT_GFX_PIPELINE.
Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -4296,6 +4296,7 @@ static void gfx_v9_0_update_gfx_cg_power_gating(struct amdgpu_device *adev,
 			gfx_v9_0_enable_gfx_pipeline_powergating(adev, true);
 	} else {
 		gfx_v9_0_enable_gfx_cg_power_gating(adev, false);
+		if (adev->pg_flags & AMD_PG_SUPPORT_GFX_PIPELINE)
 			gfx_v9_0_enable_gfx_pipeline_powergating(adev, false);
 	}