Motorola CPCAP on key

This module is part of the CPCAP. For more details about the whole
chip see Documentation/devicetree/bindings/mfd/motorola-cpcap.txt.

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

Required properties:
- compatible: should be one of the following
   - "motorola,cpcap-pwrbutton"
- interrupts: irq specifier for CPCAP's ON IRQ

Example:

&cpcap {
        cpcap_pwrbutton: pwrbutton {
                compatible = "motorola,cpcap-pwrbutton";
                interrupts = <23 IRQ_TYPE_NONE>;
        };
};