dt-bindings: pinctrl: Convert Amlogic Meson pinctrl binding

Convert Amlogic Meson pin controller binding to yaml.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/dd29c1b7-05db-dd98-df40-20a238d89a96@gmail.com


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