windows cdrom cache flush (Stefano Stabellini)

windows cdrom cache flush (Stefano Stabellini)

Windows only flushes its cache of a CDROM if it gets a
SENSE_UNIT_ATTENTION CHECK_CONDITION response to a REQUEST_SENSE
command.
Make sure it does so after we change the CD.

Tab damage fixed by Anthony Liguori

Signed-off-by: Stefano Stabellini <[email protected]>
Signed-off-by: Steven Smith <[email protected]>
Signed-off-by: Anthony Liguori <[email protected]>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5698 c046a42c-6fe2-441c-8c8c-71466251a162