[GTP] Fix decoding of UMTS GTP QoS Profile i n Radius and Diameter
messages.
Fixes Bug 10688

Change-Id: Iff29ae3f6cee1b4ad12a0e5c5d7fd3da1c9343af
Reviewed-on: https://code.wireshark.org/review/5244
Reviewed-by: Anders Broman <a.broman58@gmail.com>