Add enumerated value 639 to vals_parm_PID.

Per http://www.nowsms.com/discus/messages/1/EMI_UCP_Specification_40-8156.pdf

Bug: 10463
Change-Id: I55957f7b77b3dcf8c65c288791fed6428a1f4ba5
Reviewed-on: https://code.wireshark.org/review/4944
Reviewed-by: Michael Mann <mmann78@netscape.net>