bus/pci: fix use after free on unplug
bus/pci: fix use after free on unplug

rte_pci_unmap_device() needs intr_handle objects to unregister
callbacks.

Bugzilla ID: 845
Fixes: d61138d4f0e2 ("drivers: remove direct access to interrupt handle")

Signed-off-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@redhat.com>
Tested-by: Yan Xia <1406ba08a5c3383ec4511fcc3a2b9c109865bf20@intel.com>
Reviewed-by: Maxime Coquelin <9a2667dee3b90866bbc9c2696cff2b7d5616c95a@redhat.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk