MIPS: lantiq: Make reset_control_ops const

The reset_ops structure is never modified. Make it const.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: John Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Cc: kernel@pengutronix.de
Patchwork: https://patchwork.linux-mips.org/patch/12619/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lantiq/xway/reset.c

@@ -258,7 +258,7 @@ static int ltq_reset_device(struct reset_controller_dev *rcdev,
 	return ltq_deassert_device(rcdev, id);
 }
 
-static struct reset_control_ops reset_ops = {
+static const struct reset_control_ops reset_ops = {
 	.reset = ltq_reset_device,
 	.assert = ltq_assert_device,
 	.deassert = ltq_deassert_device,