drm/amdgpu: add sdma clock gating for Arcturus

Add ARCTURUS case in sdma set clockgating function
Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

@@ -2159,6 +2159,7 @@ static int sdma_v4_0_set_clockgating_state(void *handle,
 	case CHIP_VEGA12:
 	case CHIP_VEGA20:
 	case CHIP_RAVEN:
+	case CHIP_ARCTURUS:
 		sdma_v4_0_update_medium_grain_clock_gating(adev,
 				state == AMD_CG_STATE_GATE ? true : false);
 		sdma_v4_0_update_medium_grain_light_sleep(adev,