soc: mediatek: pwrap: add support for sys & tmr clocks

MT8365 requires an extra 2 clocks to be enabled to behave correctly.
Add support these 2 clocks, they are made optional since they seem to
be present only on MT8365.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Fadwa CHIBY <fchiby@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221031093401.22916-3-fchiby@baylibre.com


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