* Atmel SSC driver.

Required properties:
- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc"
	- atmel,at91rm9200-ssc: support pdc transfer
	- atmel,at91sam9g45-ssc: support dma transfer
- reg: Should contain SSC registers location and length
- interrupts: Should contain SSC interrupt

Example:
ssc0: ssc@fffbc000 {
	compatible = "atmel,at91rm9200-ssc";
	reg = <0xfffbc000 0x4000>;
	interrupts = <14 4 5>;
};
