ath79: fix mac address on eap2x5-1port devices

ath79: fix mac address on eap2x5-1port devices

Commit e816591e226a ("ath79: qca: convert to nvmem-layout") mistakenly
switched the source of the mac address from the 'info' to 'art'
partition.

This patch updates all devices that share same 'parent' device tree file
and was tested to fix the problem for eap225-outdoor-v3 - device that I
actually own.

Fixes: e816591e226a ("ath79: qca: convert to nvmem-layout")
Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
[amend commit message]
Signed-off-by: Sander Vanheule <sander@svanheule.net>