cdrom_id: Handle pre-MMC2 drives

cdrom_id: Handle pre-MMC2 drives

Those do not yet support the 0x46 "GET CONFIGURATION" support. If we have
those, fall back to the 0x51 "READ DISC INFORMATION" call. This can only
differentiate between CD-RW and CD-R, but first that's better than a complete
detection failure, and second, those old drives likely don't support more
modern media in the first place.

https://launchpad.net/bugs/502143

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>