pinctrl: mt8173: set GPIO16 to usb iddig mode

the default mode of GPIO16 pin is gpio, when set EINT16 to
IRQ_TYPE_LEVEL_HIGH, no interrupt is triggered, it can be
fixed when set its default mode as usb iddig.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/mediatek/pinctrl-mtk-mt8173.h

@@ -201,7 +201,7 @@ static const struct mtk_desc_pin mtk_pins_mt8173[] = {
 	MTK_PIN(
 		PINCTRL_PIN(16, "IDDIG"),
 		NULL, "mt8173",
-		MTK_EINT_FUNCTION(0, 16),
+		MTK_EINT_FUNCTION(1, 16),
 		MTK_FUNCTION(0, "GPIO16"),
 		MTK_FUNCTION(1, "IDDIG"),
 		MTK_FUNCTION(2, "CMFLASH"),