Convert userspace code to use generic device-tree compatible board
detection method. Users of the existing code will have to use
sysupgrade -F once to switch to the new generic board naming.
Properly setup pinctrl fixing the switch port LEDs.
Fixes commit 9c4fe103cb (ramips: add support for ZBT-WE1226)
Reported-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>