[flashrom] [PATCH v2] DediProg: support for firmware version 5.1.5

[Mathias Krause]

Hi,

the DediProg firmware version 5.1.5 of the SF-100 works just fine. Also
I've added error handling for the initial USB command to catch -EPERM
errors.

This version allows any firmware version from 2.x.y to 5.x.y, as
suggested by Carl Daniel.

Signed-off-by: Mathias Krause

Regards,
Mathias