arm64: dts: mediatek: mt8173-elm: Move pwm pinctrl to pwm0 node

The PWM pinctrl belongs to the PWM0 node, as it's strictly pwm related.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20211102144224.457446-1-angelogioacchino.delregno@collabora.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>