Revert " Use pci_intr_establish_xname in if_wm"

This reverts commit 297640a8d0ac5285275c86703d91674181e39084.
Revert " Use pci_intr_establish_xname in mpt"

This reverts commit d6a2906e7806ada45139cc86c8db6e699e8b2347.
Revert " Use pci_intr_establish_xname in virtio_attach (by ozaki-r)"

This reverts commit d0b8849583fd58bff24b39b2e5aa7629bb91a4b7.