* IFCON Communication Driver via spi master

Required properties:
- compatible : Should be "sony,ifcon_dev"
- bd_req-gpios : gpios for bd_req
- if_reset-gpios : gpios for if_reset
- watchdog-gpios : gpios for watchdog

Example:
	spidev@0 {
		compatible = "sony,ifcon_dev";
		reg = <0>;
		spi-max-frequency   = <10000000>;
		bd_req-gpios = <&gpio3 7 1>;
		if_reset-gpios = <&gpio3 9 1>;
		watchdog-gpios = <&gpio3 14 1>;
	};

