Revert "lantiq: arv7525pw: use nvmem for eeprom"

Revert "lantiq: arv7525pw: use nvmem for eeprom"

This reverts commit 9dbd45c18702cdd55fcfb0f71dc505afa1ff64d6.

Compared to ralink,mtd-eeprom , the nvmewm binding ends up byteswapping
the data on big endian hosts. Meaning on big endian, the nvmwem binding
is equivalent to:

ralink,mtd-eeprom +
ralink,eeprom-wrap

Revert as a result since there's no eeprom-swap here.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22192
Signed-off-by: Robert Marko <robimarko@gmail.com>