Add support for at91bootstrap.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>
Add support for building kernel initramfs.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>
Add generation of dtb files.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>
Add generation of ubi partition.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>
Add support for flashing using sam-ba.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>