spi/spi-mpc512x-psc: init mode bits supported by the driver

The driver should setup mode bits it supports, otherwise
adding an SPI device might fail even if the driver supports
the requested SPI mode.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
1 file changed