bsc: as_mgcp_ack_all_dlcx: support sccplite

Fix the "Unexpected DLCX received" error in TC_assignment_csd with
sccplite. Without the patch, f_perform_clear() does not catch the DLCX
for sccplite.

Related: OS#4393
Change-Id: I9a3a4407510143af4bbc77a8cfe51a137945b716
1 file changed