enb_amarisoft: add "sdr" as rf_dev_type and rx_ant parameter

this allows to use the Amarisoft PCIe cards with OGT

Change-Id: Ia373a78f59538d6dfca390431f85a7af26c9d914

src/osmo_gsm_tester/obj/enb_amarisoft.py

@@ -37,7 +37,7 @@ def on_register_schemas():
     schema.register_config_schema('amarisoftenb', config_schema)
 
 def rf_type_valid(rf_type_str):
-    return rf_type_str in ('uhd', 'zmq')
+    return rf_type_str in ('uhd', 'zmq', 'sdr')
 
 class AmarisoftENB(enb.eNodeB):
 

src/osmo_gsm_tester/templates/amarisoft_rf_driver.cfg.tmpl

@@ -2,6 +2,9 @@ rf_driver: {
     name: "${trx.rf_dev_type}",
     args: "${trx.rf_dev_args}",
     sync: "${trx.rf_dev_sync}",
+% if trx.get('rx_ant', None) != None:
+    rx_antenna: "${trx.rx_ant}",
+% endif
 
 % if trx.rf_dev_type == 'zmq':
     dl_sample_bits: 16,