Merge remote-tracking branch 'remotes/rth/tags/pull-rth-20160712' into staging

Merge remote-tracking branch 'remotes/rth/tags/pull-rth-20160712' into staging

target-sparc improvements, v4

# gpg: Signature made Tue 12 Jul 2016 19:04:33 BST
# 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>"
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* remotes/rth/tags/pull-rth-20160712: (24 commits)
  target-sparc: Elide duplicate updates to fprs
  target-sparc: Use cpu_loop_exit_restore from helper_check_ieee_exceptions
  target-sparc: Use cpu_fsr in stfsr
  target-sparc: Use explicit writes to cpu_fsr
  target-sparc: Remove helper_ldf_asi, helper_stf_asi
  target-sparc: Directly implement block and short ldf/stf asis
  target-sparc: Directly implement easy ldf/stf asis
  target-sparc: Pass TCGMemOp constants to helper_ld/st_asi
  target-sparc: Fix obvious error in ASI_M_BFILL
  target-sparc: Directly implement easy ldd/std asis
  target-sparc: Introduce gen_check_align
  target-sparc: Use QT0 to return results from ldda
  target-sparc: Directly implement easy ld/st asis
  target-sparc: Use defines from asi.h
  target-sparc: Add UA2005 defines to asi.h
  target-sparc: Import linux/arch/sparc/include/uapi/asm/asi.h
  target-sparc: Pass TCGMemOp to gen_ld/st_asi
  target-sparc: Introduce get_asi
  target-sparc: Store %asi in TB flags
  target-sparc: Unify asi handling between 32 and 64-bit
  ...

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