pc,virtio: regression, test fixes

fixes regressions:
    virtio error message triggered by seabios
    failure in vhost due to VIRTIO_F_RING_RESET
    broken keyboard under seabios

some biosbits test fixes

there's still a known regression with migration and vsock,
not fixed yet.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu

:
  virtio: disable error for out of spec queue-enable
  acpi/tests/avocado/bits: keep the work directory when BITS_DEBUG is set in env
  tests/avocado: configure acpi-bits to use avocado timeout
  MAINTAINERS: add mst to list of biosbits maintainers
  tests: acpi: x86: update expected DSDT after moving PRQx fields in _SB scope
  acpi: x86: move RPQx field back to _SB scope
  tests: acpi: whitelist DSDT before moving PRQx to _SB scope
  vhost: mask VIRTIO_F_RING_RESET for vhost and vhost-user devices

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>