MIPS: ralink: Fix MT7628 pinmux

MIPS: ralink: Fix MT7628 pinmux

commit 8ef4b43cd3794d63052d85898e42424fd3b14d24 upstream.

According to the datasheet the REFCLK pin is shared with GPIO#37 and
the PERST pin is shared with GPIO#36.

Fixes: 53263a1c6852 ("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
Patchwork: https://patchwork.linux-mips.org/patch/16046/
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>