The LAC, RAC, SAC, and TAC tend to be defined in ASN.1 as OCTET STRINGS
of lengths 1, 2, or 3. It generally makes sense to dissect them as
FT_UINT[8,16,24], as appropriate, with BASE_DEC_HEX instead of as FT_BYTES,
so standardize on that. See commit d6f91a7ca4
for similar work for S1AP.