pinctrl: rza1: constify pinconf_ops, pinctrl_ops, and pinmux_ops structures

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

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

drivers/pinctrl/pinctrl-rza1.c

@@ -1026,7 +1026,7 @@ static int rza1_set_mux(struct pinctrl_dev *pctldev, unsigned int selector,
 	return 0;
 }
 
-static struct pinmux_ops rza1_pinmux_ops = {
+static const struct pinmux_ops rza1_pinmux_ops = {
 	.get_functions_count	= pinmux_generic_get_function_count,
 	.get_function_name	= pinmux_generic_get_function_name,
 	.get_function_groups	= pinmux_generic_get_function_groups,