drm/amd/powerplay: add STABLE_PSTATE_SCLK and STABLE_PSTATE_MCLK when read sensor for SMU11

add AMDGPU_PP_SENSOR_STABLE_PSTATE_SCLK and
AMDGPU_PP_SENSOR_STABLE_PSTATE_MCLK to support
read sensor for SMU11.
Signed-off-by: Chengming Gui <Jack.Gui@amd.com>
Reviewed-by: Kevin Wang <kevink1.wang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -73,6 +73,14 @@ int smu_common_read_sensor(struct smu_context *smu, enum amd_pp_sensors sensor,
 	int ret = 0;
 
 	switch (sensor) {
+	case AMDGPU_PP_SENSOR_STABLE_PSTATE_SCLK:
+		*((uint32_t *)data) = smu->pstate_sclk;
+		*size = 4;
+		break;
+	case AMDGPU_PP_SENSOR_STABLE_PSTATE_MCLK:
+		*((uint32_t *)data) = smu->pstate_mclk;
+		*size = 4;
+		break;
 	case AMDGPU_PP_SENSOR_ENABLED_SMC_FEATURES_MASK:
 		ret = smu_feature_get_enabled_mask(smu, (uint32_t *)data, 2);
 		*size = 8;