tbf: Improve TBF name description in logs

Change format to print the state at the end, to resemble more the same
format used by FSMs.
Furthermore, by moving it at the end, print it only when "enclousure" is
requested, aka when not requested by FSM to update its internal name.
The consequence of this logc is that log lines printed from FSM don't
end up with the same state string printed twice in different places.

While at it, shorten the EGPRS/GPRS indicator to one character, which
should be understandable enough since it matches what's usually seen in
mobile phones to signal one or another.

Change-Id: I86b5f042fae77721b22fc026228677bd56768ba9
---
M src/tbf.cpp
M tests/alloc/AllocTest.err
M tests/app_info/AppInfoTest.err
M tests/ms/MsTest.err
M tests/tbf/TbfTest.err
M tests/types/TypesTest.err
M tests/ulc/PdchUlcTest.err
7 files changed, 446,018 insertions(+), 445,999 deletions(-)