Power off for Palmas series devices.

Required Properties:
 - compatible : Must be "ti,palmas-pm"

Optional Properties:
 - system-pmic-power-off : Use system PMIC to power off device.
 - system-pmic-power-reset : Use system PMIC to power reset device.

Example:
palmas_power {
	compatible = "ti,palmas-pm";
	system-pmic-power-off;
	system-pmic-power-reset;
};
