The usb-storage driver 'fixes up' the INQUIRY data returned by a device so
that it reads SCSI rev 2 by intercepting the data in-flight.  This was done
to make various SCSI drivers (sd, sr, etc.) work with the device.

However, this technique also has the unfortunate side-effect that nobody
can see the real rev. -- not even sg users.

This patch changes that.  Now, the SCSI revision is changed in the
slave_configure() function.  Thus, the 'real' data is available to anyone
who wants to issue an INQUIRY directly via any means.

This also simplifies the code somewhat.
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>