pinctrl: armada-37xx: constify pinconf_ops, pinctrl_ops, and pinmux_ops structures

This pinconf_ops structure is only stored in the const pinconf_ops
field of a pinctrl_desc structure. Make the pinconf_ops structure
const as well.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mvebu/pinctrl-armada-37xx.c

@@ -254,7 +254,7 @@ static int armada_37xx_pin_config_group_set(struct pinctrl_dev *pctldev,
 	return -ENOTSUPP;
 }
 
-static struct pinconf_ops armada_37xx_pinconf_ops = {
+static const struct pinconf_ops armada_37xx_pinconf_ops = {
 	.is_generic = true,
 	.pin_config_group_get = armada_37xx_pin_config_group_get,
 	.pin_config_group_set = armada_37xx_pin_config_group_set,