spi: fsl-(e)spi: Support compile as module

Signed-off-by: Esben Haabendal <eha@deif.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --cc drivers/spi/Kconfig
Simple merge

diff --cc drivers/spi/spi-fsl-cpm.c
Simple merge

diff --cc drivers/spi/spi-fsl-lib.c
Simple merge

diff --cc drivers/spi/spi-fsl-lib.h
Simple merge