Input: mtk-pmic-keys: add MT6357 support

Add PMIC Keys support on MT6357 SoC.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/20221005-mt6357-support-v8-6-560caaafee53@baylibre.com


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