Remove driver model CONFIGs from the board config headers and use Kconfig instead.
Signed-off-by: Simon Glass
CONFIG_SPL=y CONFIG_SYS_EXTRA_OPTIONS="NAND" +S:CONFIG_ARM=y +S:CONFIG_OMAP34XX=y +S:CONFIG_TARGET_OMAP3_BEAGLE=y CONFIG_DM=y CONFIG_DM_GPIO=y CONFIG_DM_SERIAL=y
