drm/amdgpu: Add new AMDGPU_PP_SENSOR_MIN/MAX_FAN_RPM sensor

For getting the min/max fan speed in RPM units.
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/kgd_pp_interface.h

@@ -114,6 +114,8 @@ enum amd_pp_sensors {
 	AMDGPU_PP_SENSOR_STABLE_PSTATE_SCLK,
 	AMDGPU_PP_SENSOR_STABLE_PSTATE_MCLK,
 	AMDGPU_PP_SENSOR_ENABLED_SMC_FEATURES_MASK,
+	AMDGPU_PP_SENSOR_MIN_FAN_RPM,
+	AMDGPU_PP_SENSOR_MAX_FAN_RPM,
 };
 
 enum amd_pp_task {