Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20190704-1' into staging

target-arm queue:
 * more code-movement to separate TCG-only functions into their own files
 * Correct VMOV_imm_dp handling of short vectors
 * Execute Thumb instructions when their condbits are 0xf
 * armv7m_systick: Forbid non-privileged accesses
 * Use _ra versions of cpu_stl_data() in v7M helpers
 * v8M: Check state of exception being returned from
 * v8M: Forcibly clear negative-priority exceptions on deactivate

# gpg: Signature made Thu 04 Jul 2019 17:31:22 BST
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20190704-1:
  target/arm: Correct VMOV_imm_dp handling of short vectors
  target/arm: Execute Thumb instructions when their condbits are 0xf
  hw/timer/armv7m_systick: Forbid non-privileged accesses
  target/arm: Use _ra versions of cpu_stl_data() in v7M helpers
  target/arm: v8M: Check state of exception being returned from
  arm v8M: Forcibly clear negative-priority exceptions on deactivate
  target/arm/helper: Move M profile routines to m_helper.c
  target/arm: Restrict semi-hosting to TCG
  target/arm: Move debug routines to debug_helper.c

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