Merge remote-tracking branch 'remotes/stsquad/tags/pull-mttcg-fixups-090317-1' into...

Fix-ups for MTTCG regressions for 2.9

This is the same as v3 posted a few days ago except with a few extra
Reviewed-by tags added.

# gpg: Signature made Thu 09 Mar 2017 10:45:18 GMT
# gpg:                using RSA key 0xFBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>"
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-mttcg-fixups-090317-1:
  hw/intc/arm_gic: modernise the DPRINTF
  target/arm/helper: make it clear the EC field is also in hex
  target-i386: defer VMEXIT to do_interrupt
  target/mips: hold BQL for timer interrupts
  translate-all: exit cpu_restore_state early if translating
  target/xtensa: hold BQL for interrupt processing
  s390x/misc_helper.c: wrap IO instructions in BQL
  sparc/sparc64: grab BQL before calling cpu_check_irqs
  cpus.c: add additional error_report when !TARGET_SUPPORT_MTTCG
  target/i386/cpu.h: declare TCG_GUEST_DEFAULT_MO
  vl/cpus: be smarter with icount and MTTCG

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