improvement(74nvmf): lookup required NIC kernel modules for NBFT interfaces

improvement(74nvmf): lookup required NIC kernel modules for NBFT interfaces

When dracut is called with '--hostonly-mode strict' and perhaps even
with --hostonly-nics '' as done by kdump/mkdumprd, all the kernel
modules related to hostonly networking are stripped down. In such
a case it is viable to lookup and install the required kernel modules
ourselves, based on any currently present nbft interfaces.

Note: the lookup depends on the current 'nbftX' network interface
naming.

Signed-off-by: Tomas Bzatek <tbzatek@redhat.com>