Recent changes to minibus on current amd64 breaks em0

Fri Sep 4 21:10:43 UTC 2015

Current from 9/4/2015 1:00pm PDT:
Kenel hangs on boot at:

em0: <Intel(R) PRO/1000 Network Connection 7.5.2> port 0x3100-0x311f mem 0xf3100000-0xf311ffff,0xf3125000-0xf3125fff irq 19 at device 25.0 on pci0
em0: attempting to allocate 1 MSI vectors (1 supported)
msi: routing MSI IRQ 265 to local APIC 0 vector 61
em0: using IRQ 265 for MSI
em0: Using an MSI interrupt