BTS_Tests.cfg: set mp_l1_supports_gprs to true

This parameter enables running additional TC_pcu_* tests.
Both trxcon and virtphy do support GPRS (l1gprs) now.

Change-Id: I68351bf45fa3470a3a25eae2110056abae39af47
diff --git a/bts/BTS_Tests.cfg b/bts/BTS_Tests.cfg
index 36d81e2..c6f50ad 100644
--- a/bts/BTS_Tests.cfg
+++ b/bts/BTS_Tests.cfg
@@ -25,6 +25,7 @@
 #BTS_Tests.mp_ctrl_ip   := "127.0.0.20"
 #BTS_Tests_OML.mp_oml_ip := "192.168.102.239" # home
 #BTS_Tests_OML.mp_oml_port := 3002
+BTS_Tests.mp_l1_supports_gprs := true
 
 # real BTS / RF
 #BTS_Tests.mp_bb_trxc_port := -1