Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

acpi: unit test

This just adds a unit test for previously merged functionality.
A bit unusual, but we have a contribitor under a deadline,
let's be nice and merge the unit test right away - does no harm.
Hopefully this won't be a beginning of a trend ...

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Wed 30 Sep 2020 09:13:13 BST
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  tests/acpi: add DSDT.hpbrroot DSDT table blob to test global i440fx hotplug
  tests/acpi: unit test exercising global pci hotplug off for i440fx

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