scsi: Fix the name string memory leak during scsi scan

scsi: Fix the name string memory leak during scsi scan

There is a memory leak during the scsi scan process due to the
strdup'ed name string is never freed. Actually it is unnecessary
to pass a strdup'ed name string to blk_create_devicef() as we can
use the name string on the stack directly.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>