spi: spi-rockchip: cleanup use struct spi_controller

Cleanup, move from the compatibily layer struct spi_master over
to struct spi_controller, and rename the related function calls.

Signed-off-by: Chris Ruehl <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: ruehlchris