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

Pull request

Here are NIC fixes from Fam Zheng that prevent rx hangs (caused by NIC models
where .can_receive() stops rx but qemu_flush_queued_packets() isn't called).

# gpg: Signature made Mon Jul 27 14:51:48 2015 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/net-pull-request:
  axienet: Flush queued packets when rx is done
  dp8393x: Flush packets when link comes up
  stellaris_enet: Flush queued packets when read done
  mipsnet: Flush queued packets when receiving is enabled
  milkymist-minimac2: Flush queued packets when link comes up
  mcf_fec: Drop mcf_fec_can_receive
  etsec: Flush queue when rx buffer is consumed
  etsec: Move etsec_can_receive into etsec_receive
  usbnet: Drop usbnet_can_receive
  eepro100: Drop nic_can_receive
  pcnet: Drop pcnet_can_receive
  xgmac: Drop packets with eth_can_rx is false.
  hw/net: fix mcf_fec driver receiver
  hw/net: add simple phy support to mcf_fec driver
  hw/net: add ANLPAR bit definitions to generic mii
  hw/net: create common collection of MII definitions

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