MIPS: ralink: Fix typos in rt3883 pinctrl

MIPS: ralink: Fix typos in rt3883 pinctrl

There are two copy & paste errors in the definition of the 5GHz LNA and
second ethernet pinmux.

Fixes: 829d0308b328 ("MIPS: ralink: cleanup the soc specific pinmux data")
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.19.x-
Patchwork: https://patchwork.linux-mips.org/patch/15328/
Signed-off-by: James Hogan <james.hogan@imgtec.com>