dt-bindings: pinctrl: qcom: Add QCM2290 pinctrl bindings

Add device tree bindings for QCM2290 pinctrl.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210923033224.29719-2-shawn.guo@linaro.org


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>