Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20201112.0' into staging

VFIO update 2020-11-12

 * Fix coverity reported use-after-free (Kirti Wankhede)

# gpg: Signature made Thu 12 Nov 2020 23:00:13 GMT
# gpg:                using RSA key 239B9B6E3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex@shazbot.org>" [full]
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>" [full]
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B  8A90 239B 9B6E 3BB0 8B22

* remotes/awilliam/tags/vfio-update-20201112.0:
  Fix use after free in vfio_migration_probe

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>