sh-pfc: sh73a0: Add missing IRQ15

The external IRQ15 input multiplexed on GPIO 0 is missing. Add it.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sh-pfc/pfc-sh73a0.c

@@ -3651,6 +3651,7 @@ static const struct pinmux_data_reg pinmux_data_regs[] = {
 };
 
 static const struct pinmux_irq pinmux_irqs[] = {
+	PINMUX_IRQ(irq_pin(15), 0),
 	PINMUX_IRQ(irq_pin(19), 9),
 	PINMUX_IRQ(irq_pin(1), 10),
 	PINMUX_IRQ(irq_pin(0), 11),