dom0: Support for pcidevs in qvm-prefs
dom0: Support for pcidevs in qvm-prefs

Can be used to e.g. have two NetVMs, eatch with one network interface assigned.

woju/qubes-core-admin,marmarek/qubes-core-admin,QubesOS/qubes-core-admin,marmarek/qubes-core-admin,woju/qubes-core-admin,woju/qubes-core-admin,marmarek/qubes-core-admin,QubesOS/qubes-core-admin,woju/qubes-core-admin,QubesOS/qubes-core-admin