migration: interfaces: T2622: fix pseudo-ethernet migration
migration: interfaces: T2622: fix pseudo-ethernet migration

By implementation misstake we exited the migrationscript if no VXLAN interface
was found but this was wrong as the same loop is used on pseudo-ethernet
interfaces. The Migrator previously only worked on pseudo-ethernet when
also a VXLAN interface was present. This has been corrected.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x