Merge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20140923-1' into staging

usb: enable hotplug, switch to realize, ohci tracing, misc fixes.

# gpg: Signature made Tue 23 Sep 2014 12:42:29 BST using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-usb-20140923-1: (26 commits)
  usb: tag standalone ehci as hotpluggable
  usb: tag standalone uhci as hotpluggable
  usb: tag xhci as hotpluggable
  usb-serial: only check speed once at realize time
  usb-bus: introduce a wrapper function to check speed
  usb-bus: remove "init" from USBDeviceClass struct
  usb-mtp: convert init to realize
  usb-redir: convert init to realize
  usb-audio: convert init to realize
  dev-wacom: convert init to realize
  dev-hid: convert init to realize
  usb-ccid: convert init to realize
  dev-serial: convert init to realize
  dev-bluetooth: convert init to realize
  dev-uas: using error_report instead of fprintf
  dev-uas: convert init to realize
  dev-storage: usring error_report instead of fprintf/printf
  dev-storage: convert init to realize
  usb-hub: convert init to realize
  libusb: using error_report instead of fprintf
  ...

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