apm821xx: unify My Book Live Single + Duo images
By takimata:
"Come to think of it, an MBL Single board boots up just fine on an
MBL Duo image, and the MBL Single board identifies completely
identical to the MBL Duo
(Board: Apollo-3G - APM82181 Board, 2*SATA, 1*USB).
I wonder if there is any downside to just using the MBL Duo firmware
on a MBL Single. I wonder if the two firmwares could even be unified."
<https://forum.lede-project.org/t/wd-mybook-live-duo-two-disks/16195/9>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>