linux-phytec-fsl

spi/bcm63xx: allow for probing through devicetree

Add required binding support to probe through device tree.

Use the compatible instead of the resource size for identifiying the
block type, and allow reducing the number of cs lines through OF.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>