Texas Instruments TPS65218 power button

This driver provides a simple power button event via an Interrupt.

Required properties:
- compatible: should be "ti,tps65218-pwrbutton"
- interrupts: should be one of the following
   - <3 IRQ_TYPE_EDGE_BOTH>: For controllers compatible with tps65218

Example:

&tps {
	power-button {
		compatible = "ti,tps65218-pwrbutton";
		interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
	};
};