pinctrl: use "const struct ..." rather than "struct ... const"

Only this member, pins, is defined as "struct ... const *", but the
others in this struct, pinlops, pmxops, confops, etc. are defined as
"const struct ... *".

Swap the "struct pinctrl_pin_desc" and "const" for consistency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

include/linux/pinctrl/pinctrl.h

@@ -127,7 +127,7 @@ struct pinctrl_ops {
  */
 struct pinctrl_desc {
 	const char *name;
-	struct pinctrl_pin_desc const *pins;
+	const struct pinctrl_pin_desc *pins;
 	unsigned int npins;
 	const struct pinctrl_ops *pctlops;
 	const struct pinmux_ops *pmxops;