Device-Tree bindings for hix5hd2 ir IP

Required properties:
	- compatible: Should contain "hisilicon,hix5hd2-ir".
	- reg: Base physical address of the controller and length of memory
	  mapped region.
	- interrupts: interrupt-specifier for the sole interrupt generated by
	  the device. The interrupt specifier format depends on the interrupt
	  controller parent.
	- clocks: clock phandle and specifier pair.
	- hisilicon,power-syscon: phandle of syscon used to control power.

Optional properties:
	- linux,rc-map-name : Remote control map name.

Example node:

	ir: ir@f8001000 {
		compatible = "hisilicon,hix5hd2-ir";
		reg = <0xf8001000 0x1000>;
		interrupts = <0 47 4>;
		clocks = <&clock HIX5HD2_FIXED_24M>;
		hisilicon,power-syscon = <&sysctrl>;
		linux,rc-map-name = "rc-tivo";
	};

Add DT bindings for hix5hd2
[media] rc: Add DT bindings for hix5hd2

Signed-off-by: Guoxiong Yan <99666e05cf54271c2e4d228b850451c318a6f4f1@huawei.com>
Signed-off-by: Zhangfei Gao <b1f7e1a0ab5f2fe9a6663bef87918f01828cf598@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@osg.samsung.com>
