Disable some of the ipq40xx devices due to their kernel size limitations.
These devices fail to build with kernel 5.10 and full buildbot config.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
[keep gl-b1300/gl-s1300 enabled, extend commit message]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>