camcontrol: change hueristic for I/O-less devtype

Some SATA drives have 'config' set to 0 in the identify block. Rather than rely
on it, use the strings windows uses to display the drive since they are supposed
to be space padded and will always be non-zero.

(cherry picked from commit 6b7580f7b1b66134286813b971ab575862b95426)