IR Decoder (IRDEC) on ZTE ZX family SoCs

Required properties:
 - compatible: Should be "zte,zx296718-irdec".
 - reg: Physical base address and length of IRDEC registers.
 - interrupts: Interrupt number of IRDEC.

Exmaples:

	irdec: ir-decoder@111000 {
		compatible = "zte,zx296718-irdec";
		reg = <0x111000 0x1000>;
		interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
	};
