What:		/sys/devices/*/<our-device>/nvmem
Date:		December 2017
Contact:	PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Description:	read-only access to the efuse on the Ingenic JZ4780 SoC
		The SoC has a one time programmable 8K efuse that is
		split into segments. The driver supports read only.
		The segments are
		0x000   64 bit Random Number
		0x008  128 bit Ingenic Chip ID
		0x018  128 bit Customer ID
		0x028 3520 bit Reserved
		0x1E0    8 bit Protect Segment
		0x1E1 2296 bit HDMI Key
		0x300 2048 bit Security boot key
Users:		any user space application which wants to read the Chip
		and Customer ID
