Platform device for Host Based Touch Processing (HBTP)

hbtp_input is a kernel driver that provides functionality needed by
Host Based Touch Processing (HBTP) from the kernel. One of the
functionality is to manage the power source for touch Analog Front
End (AFE).

Required properties:

 - compatible		: should be "qcom,hbtp-input"

Optional properties:

 - vcc_ana-supply	: Analog power supply needed to power device
 - qcom,afe-load	: AFE/Analog supply load in uA
 - qcom,afe-vtg-min	: AFE/Analog minimum voltage in uV
 - qcom,afe-vtg-max	: AFE/Analog maximum voltage in uV
 - qcom,dig-load	: Digital supply load in uA
 - qcom,dig-vtg-min	: Digital supply minimum voltage in uV
 - qcom,dig-vtg-max	: Digital supply maximum voltage in uV
 - qcom,display-resolution	: Display resolution - maxX, maxY
 - qcom,use-scale	: boolean, enables the scaling for touch coordinates

Optional properties if qcom,use-scale DT property is defined:
 - qcom,def-maxx	: default X-resolution of the touch panel.
 - qcom,def-maxy	: default Y-resolution of the touch panel.
			(Above two properties should be defined in pairs only)
 - qcom,des-maxx	: desired X-resolution of the touch panel.
 - qcom,des-maxy	: desired Y-resolution of the touch panel.
			(Above two properties should be defined in pairs only)

Example:
	&soc {
		hbtp {
			compatible = "qcom,hbtp-input";
			vcc_ana-supply = <&pm8941_l17>;
			vcc_dig-supply = <&pm8950_l16>;
			qcom,afe-load = <50000>;
			qcom,afe-vtg-min = <2850000>;
			qcom,afe-vtg-max = <2850000>;
			qcom,dig-load = <15000>;
			qcom,dig-vtg-min = <1800000>;
			qcom,dig-vtg-max = <1800000>;
			qcom,display-resolution = <719 1279>;
			qcom,use-scale;
			qcom,default-max-x = <1080>;
			qcom,default-max-y = <1920>;
			qcom,desired-max-x = <720>;
			qcom,desired-max-y = <1280>;
		};
	};