hwdb: de-duplicate and sort OUI entries

hwdb: de-duplicate and sort OUI entries

Ignoring duplicate entry: 0001C8 = "THOMAS CONRAD CORP.", "CONRAD CORP."
Ignoring duplicate entry: 080030 = "NETWORK RESEARCH CORPORATION", "ROYAL MELBOURNE INST OF TECH"
Ignoring duplicate entry: 080030 = "NETWORK RESEARCH CORPORATION", "CERN"
→ we have two vendor prefixes with duplicate entries. For the first one,
there are two entries with what appear to be the same company. In the
second case, the same prefix is assigned to three different entities.
I arbitrarily chose to prefer the first entry.