pinctrl: dt bindings: Add pinfunc header file for mt2701
Add pinfunc header file, mt2701 related dts will include it
Signed-off-by: Biao Huang <biao.huang@mediatek.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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