Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20171012' into staging

target-arm queue:
 * v8M: SG, BLXNS, secure-return
 * v8M: fixes for coverity issues in previous patches
 * arm: fix armv7m_init() declaration to match definition
 * watchdog/aspeed: fix variable type to store reload value

# gpg: Signature made Thu 12 Oct 2017 17:02:49 BST
# gpg:                using RSA key 0x3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20171012:
  nvic: Fix miscalculation of offsets into ITNS array
  nvic: Add missing 'break'
  target/arm: Implement SG instruction corner cases
  target/arm: Support some Thumb insns being always unconditional
  target-arm: Simplify insn_crosses_page()
  target/arm: Pull Thumb insn word loads up to top level
  target-arm: Don't check for "Thumb2 or M profile" for not-Thumb1
  target/arm: Implement secure function return
  target/arm: Implement BLXNS
  target/arm: Implement SG instruction
  target/arm: Add M profile secure MMU index values to get_a32_user_mem_index()
  arm: fix armv7m_init() declaration to match definition
  watchdog/aspeed: fix variable type to store reload value

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