usb: misc fixes.
# gpg: Signature made Mon 13 Jun 2016 14:09:15 BST
# gpg: using RSA key 0x4CB6D8EED3E87138
# 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>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901 FE7D 4CB6 D8EE D3E8 7138
* remotes/kraxel/tags/pull-usb-
20160613-1:
vl: Eliminate usb_enabled()
pxa2xx: Unconditionally enable USB controller
hw/usb/dev-network.c: Use ldl_le_p() and stl_le_p()
usb-host: add special case for bus+addr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>