Merge "radio: RTC6226: add Documentation file for rtc6226 driver"

Richwave FM radio device

-FM RX playback with RDS

FM signal is demodulated then audio L/R samples are sent to external audio codec.

FM Rx RDS data received sent to host processor on I2C.

Required Properties:

- compatible: "rtc6226"

Example:

	rtc6226 {

		compatible = "rtc6226";

	};