QMI thermal mitigation(TS) sensor.

The QMI TS Sensor driver can list the sensors that are available in the
remote subsystem. This driver can read the temperature, set threshold and
get threshold notification.

Each child node of the QMI TS devicetree node represents a remote
subsystem and it can have more than one remote sensor names.

Properties:

- compatible:
	Usage: required
	Value type: <string>
	Definition: should be "qcom,qmi-sensors"

- #thermal-sensor-cells:
	Usage: required
	Value type: <integer>
	Definition: Must be 1. See thermal.txt for description.

Subsystem properties:
- qcom,instance-id:
	Usage: required
	Value type: <integer>
	Definition: Remote subsystem QMI server instance id to be used for
			communicating with QMI.

- qcom,qmi-sensor-names:
	Usage: required
	Value type: <array of string>
	Definition: Remote sensor names. Below strings
		are the only acceptable sensor names,
		1. pa
		2. pa_1
		3. pa_2
		4. qfe_pa0
		5. qfe_wtr0
		6. modem_tsens
		7. qfe_mmw0
		8. qfe_mmw1
		9. qfe_mmw2
		10. qfe_mmw3
		11. xo_therm
		12. qfe_pa_mdm
		13. qfe_pa_wtr
		14. qfe_mmw_streamer0
		15. qfe_mmw0_mod
		16. qfe_mmw1_mod
		17. qfe_mmw2_mod
		18. qfe_mmw3_mod
		19. qfe_ret_pa0
		20. qfe_wtr_pa0
		21. qfe_wtr_pa1
		22. qfe_wtr_pa2
		23. qfe_wtr_pa3
		24. sys_therm1
		25. sys_therm2
		26. modem_tsens1
		27. qfe_ret_pa0_fr1
		28. qfe_wtr_pa0_fr1
		29. qfe_wtr_pa1_fr1
		30. qfe_wtr_pa2_fr1
		31. qfe_wtr_pa3_fr1


Example:

qmi_sensor: qmi-ts-sensors {
	compatible = "qcom,qmi-sensors";
	#thermal-sensor-cells = <1>;

	modem {
		qcom,instance-id = <0x0>;
		qcom,qmi-sensor-names = "pa",
					"pa_1",
					"qfe_pa0",
					"qfe_wtr0";
	};
};