dt-bindings: thermal: Add cpu isolation cooling device

QTI CPU isolation cooling devices.

The CPU isolation cooling device will be used for isolating a CPU on a thermal

condition. This cooling device driver can register one cooling device per CPU,

which can be used by thermal zone to mitigate.

Each child node will represent a cooling device and the child node should

point to the CPU, which will be mitigated by that cooling device instance.

Properties:

- compatible:

	Usage: required

	Value type: <string>

	Definition: should be "qcom,cpu-isolate"

Cooling device node:

- qcom,cpu:

	Usage: required

	Value type: <phandle>

	Definition: phandle to the CPU device that this cooling device will

			mitigate.

-#cooling-cells:

	Usage: required

	Value type: <integer>

	Definition: Must be 2. Needed for of_thermal as cooling device

			identifier. Please refer to

			<devicetree/bindings/thermal/thermal.txt> for more

			details.

Example:

	qcom,cpu-isolation {

		compatible = "qcom,cpu-isolate";

		cpu0_isolate: cpu0-isolate {

			qcom,cpu = <&CPU0>;

			#cooling-cells = <2>;

		};

		cpu1_isolate: cpu1-isolate {

			qcom,cpu = <&CPU1>;

			#cooling-cells = <2>;

		};

		cpu2_isolate: cpu2-isolate {

			qcom,cpu = <&CPU2>;

			#cooling-cells = <2>;

		};

		cpu3_isolate: cpu3-isolate {

			qcom,cpu = <&CPU3>;

			#cooling-cells = <2>;

		};

        };