library/L1CTL_PortType: allow sending L1ctlDlMessage via L1CTL_PT

We need to be able to send L1ctlDlMessage to the l1gprs_test [1],
a special program for testing the MS side GRR implementation.

Change-Id: I18e7585a8e93e3fafeda63b7325cfcc73e792abd
Related: [1] I36ceec4035b2ea593d47998f3f14f1415c606765
Related: OS#5500
1 file changed