Device-Tree bindings for inputc/rpmsg_input.c input driver over
rpmsg. For NXP i.MX7ULP EVK platform, all sensors connect with
M4, A core access sensor should communicate with M4 core by rpmsg
bus.

Required properties:
	- compatible = "fsl,rpmsg-input";

Examples:
	rpmsg_sensor: rpmsg-sensor {
		compatible = "fsl,rpmsg-input";
	};