Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20150514' into staging

Per-memop alignment

# gpg: Signature made Thu May 14 20:17:27 2015 BST using RSA key ID 4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"

* remotes/rth/tags/pull-tcg-20150514:
  tcg: Add MO_ALIGN, MO_UNALN
  tcg: Push merged memop+mmu_idx parameter to softmmu routines
  tcg: Merge memop and mmu_idx parameters to qemu_ld/st

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