Amlogic Meson8 and Meson8b "analog top" registers:
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The analog top registers contain information about the so-called
"metal revision" (which encodes the "minor version") of the SoC.

Required properties:
- reg: the register range of the analog top registers
- compatible: depending on the SoC this should be one of:
		- "amlogic,meson8-analog-top"
		- "amlogic,meson8b-analog-top"
		along with "syscon"


Example:

	analog_top: analog-top@81a8 {
		compatible = "amlogic,meson8-analog-top", "syscon";
		reg = <0x81a8 0x14>;
	};
