Exynos Sound Subsystem

The device node for sound subsytem which contains codec and i2s block
that is a part of Exynos5250

Required properties :
 - compatible : Should be "samsung,exynos-sound" for sound
 - samsung,i2s-epll-clock-frequency : epll clock output frequency in Hz
 - samsung,i2s-sampling-rate : sampling rate, default is 48000
 - samsung,i2s-bits-per-sample : sample width, defalut is 16 bit
 - samsung,i2s-channels : nummber of channels, default is 2
 - samsung,i2s-lr-clk-framesize : lr clock frame size
 - samsung,i2s-bit-clk-framesize : bit clock frame size
 - samsung,codec-type : sound codec type

Example:

sound@12d60000 {
	compatible = "samsung,exynos-sound"
	samsung,i2s-epll-clock-frequency = <192000000>;
	samsung,i2s-sampling-rate = <48000>;
	samsung,i2s-bits-per-sample = <16>;
	samsung,i2s-channels = <2>;
	samsung,i2s-lr-clk-framesize = <256>;
	samsung,i2s-bit-clk-framesize = <32>;
	samsung,codec-type = "wm8994";
};