drm/amdgpu: enable GFX Power Gating for GC IP v11.0.4

Enable GFX Power Gating control for GC IP v11.0.4.
Signed-off-by: Tim Huang <tim.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c

@@ -5058,6 +5058,7 @@ static void gfx_v11_cntl_power_gating(struct amdgpu_device *adev, bool enable)
 	if (enable && (adev->pg_flags & AMD_PG_SUPPORT_GFX_PG)) {
 		switch (adev->ip_versions[GC_HWIP][0]) {
 		case IP_VERSION(11, 0, 1):
+		case IP_VERSION(11, 0, 4):
 			WREG32_SOC15(GC, 0, regRLC_PG_DELAY_3, RLC_PG_DELAY_3_DEFAULT_GC_11_0_1);
 			break;
 		default:
@@ -5091,6 +5092,7 @@ static int gfx_v11_0_set_powergating_state(void *handle,
 		amdgpu_gfx_off_ctrl(adev, enable);
 		break;
 	case IP_VERSION(11, 0, 1):
+	case IP_VERSION(11, 0, 4):
 		gfx_v11_cntl_pg(adev, enable);
 		amdgpu_gfx_off_ctrl(adev, enable);
 		break;