This reverts commit a1693bf626.
The rt288x and rt3883 devices in question don't have switches.
Only keep the merged case for rt305x.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Commit 8f6334eb94 ("ramips: explicitly disable built-in switch when needed")
did not fix rt288x and rt3883 devices. This patch deals with them.
While at it, consolidate duplicate cases in interface setup.
Signed-off-by: Sungbo Eo <mans0n@gorani.run>