srsue.conf.tmpl: set srate param with the X310

Change-Id: Icb04ed51ace97d4467558639aeb3f556dbe8678a
diff --git a/src/osmo_gsm_tester/templates/srsue.conf.tmpl b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
index 8fd405b..8d206fa 100644
--- a/src/osmo_gsm_tester/templates/srsue.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
@@ -14,6 +14,10 @@
 
 nof_antennas = ${ue.num_antennas}
 
+% if "x300" in ue.rf_dev_args:
+srate = 23.04e6
+% endif
+
 device_name = ${ue.rf_dev_type}
 device_args = ${ue.rf_dev_args},${ue.rf_dev_sync}