Revert "nvmem: imx-ocotp-ele: fix MAC address byte order"

This reverts commit 2c49e894 which is
commit 391b06ec upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I5751c5870748e048a0235845856f39bd21a569ef
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>