somimx6ul: fix patches, separate out defconfig
This patch allows the imx6ul to boot from bootdev, fat filesystem mmc 0:1, then fall back to spiflash for the spl finding u-boot.img
Errata:
- Reading from a usb flash drive has shown some issues
- more testing required, not certain on why it is failing
Signed-off-by: Brenden Tisler btisler@emacinc.com