Merge remote-tracking branch 'remotes/rth/tags/pull-or-20170214' into staging

Queued openrisc patches

# gpg: Signature made Mon 13 Feb 2017 21:21:03 GMT
# gpg:                using RSA key 0xAD1270CC4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"
# Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC  16A4 AD12 70CC 4DD0 279B

* remotes/rth/tags/pull-or-20170214: (24 commits)
  target/openrisc: Optimize for r0 being zero
  target/openrisc: Tidy handling of delayed branches
  target/openrisc: Tidy ppc/npc implementation
  target/openrisc: Optimize l.jal to next
  target/openrisc: Fix madd
  target/openrisc: Implement muld, muldu, macu, msbu
  target/openrisc: Represent MACHI:MACLO as a single unit
  target/openrisc: Implement msync
  target/openrisc: Enable trap, csync, msync, psync for user mode
  target/openrisc: Set flags on helpers
  target/openrisc: Use movcond where appropriate
  target/openrisc: Keep SR_CY and SR_OV in a separate variables
  target/openrisc: Keep SR_F in a separate variable
  target/openrisc: Invert the decoding in dec_calc
  target/openrisc: Put SR[OVE] in TB flags
  target/openrisc: Streamline arithmetic and OVE
  target/openrisc: Rationalize immediate extraction
  target/openrisc: Tidy insn dumping
  target/openrisc: Implement lwa, swa
  target/openrisc: Fix exception handling status registers
  ...

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