spi: mtk_spim: add support for upstream mediatek, spi-ipm compatible

Upstream kernel linux use a different compatible mediatek,spi-ipm.

Add support for this compatible and add handling for the additional
clock similar to how it's done by the upstream driver and handling for
all the property enabled by default.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
1 file changed