Change the PCI network drivers init functions to return the PCIDev, to
inform which slot has been hot-plugged.

Also record PCIDevice structure on NICInfo to locate for release on
hot-removal.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6593 c046a42c-6fe2-441c-8c8c-71466251a162