mtd-utils: Fix return value of ubiformat
This changeset fixes a feature regression in ubiformat. Older versions
of ubiformat, when invoked with a flash-image, would return 0 in the
case no error was encountered. Upon upgrading to latest, it was
discovered that ubiformat returned 255 even without encountering an
error condition.
This changeset corrects the above issue and causes ubiformat, when given an
image file, to return 0 when no errors are detected.
Backport fix from 2.1.2
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
7ebacd9cbaec98fbc406e8ae99c9805a24fdadc6)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
