Bug#479056: grub-probe also fails with cciss

[Roland Dreier]

I have a similar problem with HP DL380 servers with a RAID controller
that uses the "cciss" driver.  Disks show up under /dev/cciss like:

    /dev/cciss/c0d0p6 on / type ext3 (rw,errors=remount-ro)

And since grub no longer understands that, grub-mkdevicemap leaves me
with an empty device.map and I get

    grub-probe: error: Cannot find a GRUB drive for /dev/cciss/c0d0p6.  Check your device.map.

from update-grub.