MIPS: ralink: Fix typo in mt7628 pinmux function

There is a typo inside the pinmux setup code. The function is called
refclk and not reclk.

Fixes: 53263a1c

 ("MIPS: ralink: add mt7628an support")
Signed-off-by: Mathias Kresin <dev@kresin.me>
Acked-by: John Crispin <john@phrozen.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.19+
Patchwork: https://patchwork.linux-mips.org/patch/16047/


Signed-off-by: James Hogan <jhogan@kernel.org>