check mtk_is_virt_gpio input parameter,
virtual gpio need to support eint mode.

add error handler for the ko case
to fix this boot fail:
pc : mtk_is_virt_gpio+0x20/0x38 [pinctrl_mtk_common_v2]
lr : mtk_gpio_get_direction+0x44/0xb0 [pinctrl_paris]

Fixes: edd546465002 ("pinctrl: mediatek: avoid virtual gpio trying to set reg")
Singed-off-by: Jie Yang <sin_jiey...@mediatek.com>
Signed-off-by: Hanks Chen <hanks.c...@mediatek.com>

---
Changes since v1:
- update Singed-off-by
- align with pinctrl/mediatek/pinctrl-mtk-mt*.h 

---
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c 
b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index c53e2c391e32..a485d79f51a1 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -259,6 +259,10 @@ bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int 
gpio_n)
 
        desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n];
 
+       /* if the GPIO is not supported for eint mode */
+       if (desc->eint.eint_m == NO_EINT_SUPPORT)
+               return virt_gpio;
+
        if (desc->funcs && !desc->funcs[desc->eint.eint_m].name)
                virt_gpio = true;
 
-- 
2.18.0

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