Merge remote-tracking branch...

Merge remote-tracking branch 'remotes/mcayland/tags/qemu-openbios.for-upstream-20181005' into staging

qemu-openbios.for-upstream queue

# gpg: Signature made Fri 05 Oct 2018 09:48:16 BST
# gpg:                using RSA key 5BC2C56FAE0F321F
# gpg: Good signature from "Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>"
# Primary key fingerprint: CC62 1AB9 8E82 200D 915C  C9C4 5BC2 C56F AE0F 321F

* remotes/mcayland/tags/qemu-openbios.for-upstream-20181005:
  Update OpenBIOS images to 441a84d3 built from submodule.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

openbios @ 441a84d3

-Subproject commit a1280807a335cc93a4fffb6461c6419cb7a42e96
+Subproject commit 441a84d3a642a10b948369c63f32367e8ff6395b