dt-bindings: cpufreq: remove stale arm_big_little_dt entry

Generic ARM big LITTLE cpufreq driver's DT glue

-----------------------------------------------

This is DT specific glue layer for generic cpufreq driver for big LITTLE

systems.

Both required and optional properties listed below must be defined

under node /cpus/cpu@x. Where x is the first cpu inside a cluster.

FIXME: Cpus should boot in the order specified in DT and all cpus for a cluster

must be present contiguously. Generic DT driver will check only node 'x' for

cpu:x.

Required properties:

- operating-points: Refer to Documentation/devicetree/bindings/opp/opp.txt

  for details

Optional properties:

- clock-latency: Specify the possible maximum transition latency for clock,

  in unit of nanoseconds.

Examples:

cpus {

	#address-cells = <1>;

	#size-cells = <0>;

	cpu@0 {

		compatible = "arm,cortex-a15";

		reg = <0>;

		next-level-cache = <&L2>;

		operating-points = <

			/* kHz    uV */

			792000  1100000

			396000  950000

			198000  850000

		>;

		clock-latency = <61036>; /* two CLK32 periods */

	};

	cpu@1 {

		compatible = "arm,cortex-a15";

		reg = <1>;

		next-level-cache = <&L2>;

	};

	cpu@100 {

		compatible = "arm,cortex-a7";

		reg = <100>;

		next-level-cache = <&L2>;

		operating-points = <

			/* kHz    uV */

			792000  950000

			396000  750000

			198000  450000

		>;

		clock-latency = <61036>; /* two CLK32 periods */

	};

	cpu@101 {

		compatible = "arm,cortex-a7";

		reg = <101>;

		next-level-cache = <&L2>;

	};

};