GitLab

Allow any firmware version from 2.x.y to 5.x.y.
Handle errors for the initial USB command to catch -EPERM.

Corresponding to flashrom svn r1227.
Signed-off-by: Mathias Krause <mathias.krause@secunet.com>
Acked-by: Patrick Georgi <patrick@georgi-clan.de>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>