drm/amdgpu: simplify the sdma 4_x MGCG/MGLS logic.

SDMA 4_x asics share the same MGCG/MGLS setting.
Signed-off-by: Feifei Xu <Feifei.Xu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2222,21 +2222,10 @@ static int sdma_v4_0_set_clockgating_state(void *handle,
 	if (amdgpu_sriov_vf(adev))
 		return 0;
 
-	switch (adev->asic_type) {
-	case CHIP_VEGA10:
-	case CHIP_VEGA12:
-	case CHIP_VEGA20:
-	case CHIP_RAVEN:
-	case CHIP_ARCTURUS:
-	case CHIP_RENOIR:
-		sdma_v4_0_update_medium_grain_clock_gating(adev,
-				state == AMD_CG_STATE_GATE);
-		sdma_v4_0_update_medium_grain_light_sleep(adev,
-				state == AMD_CG_STATE_GATE);
-		break;
-	default:
-		break;
-	}
+	sdma_v4_0_update_medium_grain_clock_gating(adev,
+			state == AMD_CG_STATE_GATE);
+	sdma_v4_0_update_medium_grain_light_sleep(adev,
+			state == AMD_CG_STATE_GATE);
 	return 0;
 }