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

Enable GFX IP v11.0.4 CG gate/ungate control.
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

@@ -5116,6 +5116,7 @@ static int gfx_v11_0_set_clockgating_state(void *handle,
 	case IP_VERSION(11, 0, 1):
 	case IP_VERSION(11, 0, 2):
 	case IP_VERSION(11, 0, 3):
+	case IP_VERSION(11, 0, 4):
 	        gfx_v11_0_update_gfx_clock_gating(adev,
 	                        state ==  AMD_CG_STATE_GATE);
 	        break;