srsue, amarisoft/srsENB: Support setting rx/tx_gain attributes

Change-Id: I4228ba8746a54db4c17443718c01069d431361b9
diff --git a/src/osmo_gsm_tester/obj/enb_amarisoft.py b/src/osmo_gsm_tester/obj/enb_amarisoft.py
index 0b748e0..bb48880 100644
--- a/src/osmo_gsm_tester/obj/enb_amarisoft.py
+++ b/src/osmo_gsm_tester/obj/enb_amarisoft.py
@@ -209,7 +209,10 @@
         # rf driver is shared between amarisoft enb and ue, so it has a
         # different cfg namespace 'trx'. Copy needed values over there:
         config.overlay(values, dict(trx=dict(rf_dev_type=values['enb'].get('rf_dev_type', None),
-                                             rf_dev_args=values['enb'].get('rf_dev_args', None))))
+                                             rf_dev_args=values['enb'].get('rf_dev_args', None),
+                                             rx_gain=values['enb'].get('rx_gain', None),
+                                             tx_gain=values['enb'].get('tx_gain', None),
+                                            )))
 
         self.gen_conf = values