Remove profinet_type from packet_info structure.

Profinet I/O and DCOM CBA had completely separate uses for the profinet_type member, so it's okay to separate them with different proto ids tracking the proto_data.

Change-Id: I7b9c01b8d4f74d51fe9f9ef2f957479dff0a7157
Reviewed-on: https://code.wireshark.org/review/5852
Petri-Dish: Michael Mann <mmann78@netscape.net>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>