QTI SCMI PLH Driver

The QTI SCMI PLH driver provides sysfs node for user space to
communicate to PLH algorithm in CPUCP firmware via SCMI protocol.
This driver is refactor of plh_vendor.c and plh_scmi.c based on
SCMI consolidation.

Required properties:
- compatible:		Must be "qcom,scmi_plh"

Example:

	qcom_scmi_plh: qcom,scmi_plh {
		compatible = "qcom,scmi_plh";
	};