Binding for Texas Instruments FAPLL clock.

This binding uses the common clock binding[1]. It assumes a
register-mapped FAPLL with usually two selectable input clocks
(reference clock and bypass clock), and one or more child
syntesizers.

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

Required properties:
- compatible : shall be "ti,dm816-fapll-clock"
- #clock-cells : from common clock binding; shall be set to 0.
- clocks : link phandles of parent clocks (clk-ref and clk-bypass)
- reg : address and length of the register set for controlling the FAPLL.

Examples:
	main_fapll: main_fapll {
		#clock-cells = <1>;
		compatible = "ti,dm816-fapll-clock";
		reg = <0x400 0x40>;
		clocks = <&sys_clkin_ck &sys_clkin_ck>;
		clock-indices = <1>, <2>, <3>, <4>, <5>,
				<6>, <7>;
		clock-output-names = "main_pll_clk1",
				     "main_pll_clk2",
				     "main_pll_clk3",
				     "main_pll_clk4",
				     "main_pll_clk5",
				     "main_pll_clk6",
				     "main_pll_clk7";
	};