HEADSUP: USB da(4) quirks deprecated

[Justin T. Gibbs]

> You may have a device (USB camera, pen drive, hard drive, ...) that begins
> to get errors like ...  "Synchronize cache failed, status 0x35".

If the Sync cache fails with a "reasonable error code", then the code
that silence these errors should be enhanced rather than have a quirk
entry added.

Just to reitterate, the quirks are there for situations that cannot
be handled in a more programatic way (e.g. a device that dies when
you send it a certain command).  Please don't blindly re-enable quirks
to silence junk that winds up in syslog.

--
Justin