BSC_Tests/hopping: fixup TC_fh_params_si4_cbch: bring CBCH back

Change [1] introduced a regression that caused some TC_cbsp_*
test cases to fail.  The problem is that TC_fh_params_si4_cbch
re-configures TS0 as CCCH+SDCCH4 instead of CCCH+SDCCH4+CBCH,
so the CBCH channel vanishes after this test case is executed.

[1] Ibc3b73697a1d2c8dbb27274e48f5e5ba21fdd540

Change-Id: Ia249f10c1b768a5af2b6c92ecba5d2941528f876
Related: SYS#4868, OS#4545
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index fb9fa68..8944447 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -7218,11 +7218,11 @@
 	/* Disable frequency hopping */
 	f_TC_fh_params_unset(fhp);
 
-	/* (Re)configure TS0 as CCCH+SDCCH4 and TS1 as TCH/F */
+	/* (Re)configure TS0 as CCCH+SDCCH4+CBCH and TS1 as TCH/F */
 	f_vty_enter_cfg_trx(BSCVTY, trx := 0);
 
 	f_vty_transceive(BSCVTY, "timeslot 0");
-	f_vty_transceive(BSCVTY, "phys_chan_config ccch+sdcch4");
+	f_vty_transceive(BSCVTY, "phys_chan_config ccch+sdcch4+cbch");
 	f_vty_transceive(BSCVTY, "exit"); /* go back */
 
 	f_vty_transceive(BSCVTY, "timeslot 1");