soc: mediatek: mtk-svs: Remove hardcoded irqflags

The interrupt flags are specified in devicetree: forcing them into
the driver is suboptimal and not very useful.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220726141653.177948-4-angelogioacchino.delregno@collabora.com


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