Merge remote-tracking branch 'remotes/stsquad/tags/pull-hardfloat-and-gitdm-171218...

Merge remote-tracking branch 'remotes/stsquad/tags/pull-hardfloat-and-gitdm-171218-3' into staging

Hardfloat + maintainers and gitdm

# gpg: Signature made Mon 17 Dec 2018 10:55:19 GMT
# gpg:                using RSA key FBD0DB095A9E2A44
# 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-hardfloat-and-gitdm-171218-3:
  hardfloat: implement float32/64 comparison
  hardfloat: implement float32/64 square root
  hardfloat: implement float32/64 fused multiply-add
  hardfloat: implement float32/64 division
  hardfloat: implement float32/64 multiplication
  hardfloat: implement float32/64 addition and subtraction
  fpu: introduce hardfloat
  tests/fp: add fp-bench
  softfloat: add float{32,64}_is_zero_or_normal
  softfloat: rename canonicalize to sf_canonicalize
  target/tricore: use float32_is_denormal
  softfloat: add float{32,64}_is_{de,}normal
  fp-test: pick TARGET_ARM to get its specialization
  MAINTAINERS: update status of FPU emulation
  contrib: add a basic gitdm config

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