Merge remote-tracking branch 'remotes/lalrae/tags/mips-20160323' into staging

MIPS patches 2016-03-23

Changes:
* add mips-softmmu-common.mak
* indicate presence of IEEE 754-2008 FPU in MIPS64R6-generic and P5600

# gpg: Signature made Wed 23 Mar 2016 16:38:04 GMT using RSA key ID 0B29DA6B
# gpg: Good signature from "Leon Alrae <leon.alrae@imgtec.com>"

* remotes/lalrae/tags/mips-20160323:
  default-configs: add mips-softmmu-common.mak
  target-mips: indicate presence of IEEE 754-2008 FPU in R6/R5+MSA CPUs

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