Merge remote-tracking branch 'remotes/rth/tags/pull-sparc-20161031-2' into staging

target-sparc updates for atomics and alignment

# gpg: Signature made Mon 31 Oct 2016 20:47:57 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-sparc-20161031-2:
  target-sparc: Use tcg_gen_atomic_cmpxchg_tl
  target-sparc: Use tcg_gen_atomic_xchg_tl
  target-sparc: Remove MMU_MODE*_SUFFIX
  target-sparc: Allow 4-byte alignment on fp mem ops
  target-sparc: Implement ldqf and stqf inline
  target-sparc: Remove asi helper code handled inline
  target-sparc: Implement BCOPY/BFILL inline
  target-sparc: Implement cas_asi/casx_asi inline
  target-sparc: Implement ldstub_asi inline
  target-sparc: Implement swap_asi inline
  target-sparc: Handle more twinx asis
  target-sparc: Use MMU_PHYS_IDX for bypass asis
  target-sparc: Add MMU_PHYS_IDX
  target-sparc: Introduce cpu_raise_exception_ra
  target-sparc: Use overalignment flags for twinx and block asis

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