Merge remote-tracking branch 'remotes/jasowang/tags/net-pull-request' into staging

# gpg: Signature made Tue 10 Apr 2018 04:36:01 BST
# gpg:                using RSA key EF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F  3562 EF04 965B 398D 6211

* remotes/jasowang/tags/net-pull-request:
  e1000: Old machine types, turn new subsection off
  e1000: Choose which set of props to migrate
  e1000: Migrate props via a temporary structure
  e1000: wire new subsection to property
  e1000: Dupe offload data on reading old stream
  e1000: Convert v3 fields to subsection

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