spi: sort drivers into legacy or not in CMakeLists.txt
spi: sort drivers into legacy or not in CMakeLists.txt

Sort the drivers to make it explicit of which drivers are supporting
the legacy API vs the new API.

Signed-off-by: Kumar Gala <a5e5248af4cd4f0ed8c515f61d40a6e2db46a66e@linaro.org>

punitvara/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,mbolivar/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,zephyriot/zephyr,nashif/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,ldts/zephyr,kraj/zephyr,finikorg/zephyr,Vudentz/zephyr,mbolivar/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,nashif/zephyr,explora26/zephyr,galak/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,mbolivar/zephyr,finikorg/zephyr,ldts/zephyr,Vudentz/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,finikorg/zephyr,zephyriot/zephyr,explora26/zephyr,mbolivar/zephyr,explora26/zephyr,Vudentz/zephyr,finikorg/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,explora26/zephyr,zephyriot/zephyr,kraj/zephyr,explora26/zephyr,zephyriot/zephyr,kraj/zephyr,galak/zephyr,ldts/zephyr,punitvara/zephyr,punitvara/zephyr,nashif/zephyr,ldts/zephyr,punitvara/zephyr,mbolivar/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,punitvara/zephyr,Vudentz/zephyr,zephyriot/zephyr