Memory auto-detection for mt7621 has just been added to 19.07
stable branch.
This removes the memory node for the ZBT-WE1326, which will support
revision 5 that has 256MiB RAM (Nanya NT5CC128M16IP-DI) instead of
512MiB (up to revision 4).
ref: #1930
This is taken from master commit a2c19f1d2f65 ("ramips: dts: drop
memory nodes"), where _all_ memory nodes were removed.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2155e94d4b