This fixes error erasing partial mtd partition which does not start on
eraseblock boundary and allows using fconfig to configure redboot on
devices such as the Gateworks Cambria.
Signed-off-by: Maciej Skrzypek <maciej.skrzypek@flytronic.pl>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41733 3c298f89-4303-0410-b956-a3cf2f4a3e73