Boot Brillo on picoimx board

Modify the boot partition to mmcblk0.
Modify the boot configuration for kernel.

Change-Id: Ia9ffcf75d221c8fdd61e20b527fc2f0ebbb8098d
Signed-off-by: Guoyin Chen <[email protected]>
Signed-off-by: Hui Fang <[email protected]>
Signed-off-by: Haoran Wang <[email protected]>
5 files changed