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

Change-Id: I4228ba8746a54db4c17443718c01069d431361b9
diff --git a/src/osmo_gsm_tester/resource.py b/src/osmo_gsm_tester/resource.py
index cafdab8..ded8568 100644
--- a/src/osmo_gsm_tester/resource.py
+++ b/src/osmo_gsm_tester/resource.py
@@ -92,6 +92,8 @@
         'enb[].id': schema.UINT,
         'enb[].num_prb': schema.UINT,
         'enb[].transmission_mode': schema.LTE_TRANSMISSION_MODE,
+        'enb[].tx_gain': schema.UINT,
+        'enb[].rx_gain': schema.UINT,
         'enb[].rf_dev_type': schema.STR,
         'enb[].rf_dev_args': schema.STR,
         'enb[].additional_args': schema.STR,
@@ -134,6 +136,8 @@
         'modem[].additional_args': schema.STR,
         'modem[].airplane_t_on_ms': schema.INT,
         'modem[].airplane_t_off_ms': schema.INT,
+        'modem[].tx_gain': schema.UINT,
+        'modem[].rx_gain': schema.UINT,
         'osmocon_phone[].serial_device': schema.STR,
     }