arm: mvebu: fix wrongly named DS414 pinctrl entries

While renaming pinctrl entries during reviews of Synology DS414 support
series, I missed three entries, as reported by Ben. This patch fixes
those.

Reported-by: Ben Peddell <klightspeed@killerwolves.net>
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Link: https://lkml.kernel.org/r/608e4fd6e06e9c5289a84b9c38e81b2456dbcd79.1416670812.git.arno@natisbad.org


Signed-off-by: Jason Cooper <jason@lakedaemon.net>