* Power Management Controller (PMC)
Required properties:
- compatible: Should be "atmel,<chip>-pmc".
<chip> can be: at91rm9200, at91sam9260, at91sam9g45, at91sam9n12,
at91sam9x5, sama5d3
- reg: Should contain PMC registers location and length
Examples:
pmc: pmc@fffffc00 {
compatible = "atmel,at91rm9200-pmc";
reg = <0xfffffc00 0x100>;
};