Show band info for inter-freq entries in UE capabilities.  Addresses Pascal's comments.

Change-Id: Ie60dc73e40a2ac1d80197fa712075ccff83cf797
Reviewed-on: https://code.wireshark.org/review/4032
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
Reviewed-by: Martin Mathieson <martin.r.mathieson@googlemail.com>