Merge remote-tracking branch 'remotes/vivier/tags/pull-m68k-20150629' into staging

Trivial m68k cleanup

# gpg: Signature made Mon Jun 29 16:38:40 2015 BST using DSA key ID ABF36C53
# gpg: Good signature from "Laurent Vivier <laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier <Laurent@vivier.eu>"
# gpg:                 aka "Laurent Vivier <Laurent@lvivier.info>"
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>"
# gpg:                 aka "[jpeg image of size 3881]"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 9EC7 B78A C0AC E697 5E4B  BDE3 34A4 F6C9 ABF3 6C53

* remotes/vivier/tags/pull-m68k-20150629:
  m68k: remove useless parameter op_size from gen_lea_indexed()
  m68k: remove useless file m68k-qreg.h
  m68k: is_mem is useless

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