lapd_pcap: Correctly set the pseudo-header packet type

We want the direction of the packet to be properly reflected in the
pseudo-header, so wireshark can display if the packet is sent in
network->user (BSC->BTS) direction, or in th reverse direction.

Related: OS#1764
Change-Id: I19afca0ce7e8b068bc64fa14bce6feb35aa9f1fc
1 file changed