Merge remote-tracking branch 'remotes/lalrae/tags/mips-20150804' into staging

MIPS patches 2015-08-04

Changes:
* fix semihosting for microMIPS R6
* fix an abort when booting mips64 kernel with --enable-tcg-debug

# gpg: Signature made Tue 04 Aug 2015 12:32:17 BST using RSA key ID 0B29DA6B
# gpg: Good signature from "Leon Alrae <leon.alrae@imgtec.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8DD3 2F98 5495 9D66 35D4  4FC0 5211 8E3C 0B29 DA6B

* remotes/lalrae/tags/mips-20150804:
  target-mips: Copy restrictions from ext/ins to dext/dins
  target-mips: fix semihosting for microMIPS R6

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