dt-bindings: pinctrl: mediatek,mt65xx: Deprecate pins-are-numbered

Make pins-are-numbered optional and deprecate it

Signed-off-by: Bernhard Rosenkränzer <bero@baylibre.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221129023401.278780-4-bero@baylibre.com


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