USB: storage: scsi: fix up comment to be more specific

Fix up the wording in a comment for the scsi driver saying what it does
using better terminology.

Cc: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200618094300.1887727-8-gregkh@linuxfoundation.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>