Some devices out there only have a NOR flash to store the rootfs on.

While using UBI is arguable on this kind of flash, this is something that should
be supported.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>

SVN-Revision: 44260