Device Tree bindings for max77819 Flash

Valid node name : flash

Optional properties for regulator:
 - flash-en-control : Boolean. Flash triggered by FLASHEN pin.
 - torch-en-control : Boolean. Flash triggered by TORCHEN pin.
 - enable-maxflash : Boolean. MaxFlash function enable/disable.
 - maxflash-threshold : Integer. Max Flash Low battery detection threshold.
		2400000uV to 3400000uV in 33333uV steps.
 - maxflash-hysteresis: Integer. Low battery detection hysteresis.
		One of 100000uV, 200000uV, 300000uV or -1. -1 means disabled.
 - maxflash-falling-timer : Integer. Low Battery mask timer for falling edge of battery.
		256us to 2048us in 256us steps.
 - maxflash-rising-timer : Integer. Low Battery mask timer for rising edge of battery.
		256us to 2048us in 256us steps.

Example:

	flash {
		flash-en-control;
		enable-maxflash;
	};
