ROCKCHIP PVTM 32KHz clocks *

ROCKCHIP device has two clock sources for 32KHz, external 32k osc and internal pvtm 32k.

This binding uses the common clock binding[1].

[1] Documentation/devicetree/bindings/clock/clock-bindings.txt

Required properties:
- compatible :	"rockchip,rk3368-pvtm-clock" for rk3368 soc pvtm 32k clock
- #clock-cells : shall be set to 0.

Optional property:
- clock-output-names : From common clock binding.

Example:
	pvtm_clock: pvtm-clock {
		compatible = "rockchip,rk3368-pvtm-clock";
		#clock-cells = <0>;
		clocks = <&cru SCLK_PVTM_PMU>;
		clock-names = "pvtm_pmu_clk";
		clock-output-names = "xin32k_pvtm";
		status = "okay";
	};