All other SoC DTSI files have gpio enabled by default, only
ar9330/ar9331 disable it by default, only to have it enabled again
afterwards for each individual device.
So, do not disable it in the first place, and drop all device-specific
status statements afterwards.
Though this is a cosmetic commit, it might be a pitfall for
device-support backporters if missing. Since backporting it is trivial,
let's just do it.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit dc1280ef65)