spi: rb4xx: update driver to be device tree aware

This patch updates the spi driver spi-rb4xx.c to be device tree aware

Signed-off-by: Christopher Hill <ch6574@gmail.com>
Link: https://lore.kernel.org/r/20200521183631.37806-2-ch6574@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
1 file changed