Merge remote-tracking branch 'remotes/ehabkost/tags/x86-pull-request' into staging

X86 queue, 2015-07-07

Patch "target-i386: emulate CPUID level of real hardware" was removed after the
2015-07-03 pull request.

# gpg: Signature made Tue Jul  7 15:46:23 2015 BST using RSA key ID 984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-pull-request:
  target-i386: avoid overflow in the tsc-frequency property
  i386: Introduce ARAT CPU feature

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