pinctrl: sh-pfc: ARM: Constify pins and cfg_regs arrays

The arrays are never modified, declare them as const.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
index 293a51a..a8ba257 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c
@@ -1731,7 +1731,7 @@
 #define PIN_NUMBER(r, c) (((r) - 'A') * 31 + (c) + 200)
 #define PIN_A_NUMBER(r, c) PIN_NUMBER(ROW_GROUP_A(r), c)
 
-static struct sh_pfc_pin pinmux_pins[] = {
+static const struct sh_pfc_pin pinmux_pins[] = {
 	PINMUX_GPIO_GP_ALL(),
 
 	/* Pins not associated with a GPIO port */
@@ -4237,7 +4237,7 @@
 	SH_PFC_FUNCTION(vin3),
 };
 
-static struct pinmux_cfg_reg pinmux_config_regs[] = {
+static const struct pinmux_cfg_reg pinmux_config_regs[] = {
 	{ PINMUX_CFG_REG("GPSR0", 0xE6060004, 32, 1) {
 		GP_0_31_FN, FN_IP3_17_15,
 		GP_0_30_FN, FN_IP3_14_12,