BTS: enable encryption + RLL tests for Lm (TCH/H) channels

Since OS#3419 is resolved and TCH/H channel is supported by
trxcon, both encryption and RLL tests can be finally enabled
on Lm (TCH/H) channels.

Change-Id: I78f82a5f2a7b21d91692b1c99a9ff125e65cab64
Related: OS#3256

bts/BTS_Tests.ttcn

@@ -303,7 +303,7 @@ function f_init(charstring id := "BTS-Test") runs on test_CT {
 		/* TS 1..4: TCH/F */
 		valueof(ts_RslChanNr_Bm(1)),
 		/* TS 5: TCH/H */
-		//valueof(ts_RslChanNr_Lm(5,1)),
+		valueof(ts_RslChanNr_Lm(5,1)),
 		/* TS 0: SDCCH/4 */
 		valueof(ts_RslChanNr_SDCCH4(0,2)),
 		/* TS 6: SDCCH/8 */