pinctrl: sh-pfc: r8a7796: Use generic IOCTRL register description

Move R-Car M3-W I/O voltage support over to the generic way to describe
IOCTRL registers, which will be needed for suspend/resume support.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>

drivers/pinctrl/sh-pfc/pfc-r8a7796.c

@@ -5477,11 +5477,20 @@ static const struct pinmux_drive_reg pinmux_drive_regs[] = {
 	{ },
 };
 
+enum ioctrl_regs {
+	POCCTRL,
+};
+
+static const struct pinmux_ioctrl_reg pinmux_ioctrl_regs[] = {
+	[POCCTRL] = { 0xe6060380, },
+	{ /* sentinel */ },
+};
+
 static int r8a7796_pin_to_pocctrl(struct sh_pfc *pfc, unsigned int pin, u32 *pocctrl)
 {
 	int bit = -EINVAL;
 
-	*pocctrl = 0xe6060380;
+	*pocctrl = pinmux_ioctrl_regs[POCCTRL].reg;
 
 	if (pin >= RCAR_GP_PIN(3, 0) && pin <= RCAR_GP_PIN(3, 11))
 		bit = pin & 0x1f;
@@ -5798,6 +5807,7 @@ const struct sh_pfc_soc_info r8a7796_pinmux_info = {
 	.cfg_regs = pinmux_config_regs,
 	.drive_regs = pinmux_drive_regs,
 	.bias_regs = pinmux_bias_regs,
+	.ioctrl_regs = pinmux_ioctrl_regs,
 
 	.pinmux_data = pinmux_data,
 	.pinmux_data_size = ARRAY_SIZE(pinmux_data),