mod-enb-cell-2ca: fix EARFCN

this scenario for 2xCA needs to have both cells on different EARFCN

Change-Id: I3cd12da5453aa659839862775e23d4a308b92c8e
diff --git a/sysmocom/scenarios/mod-enb-cells-2ca.conf b/sysmocom/scenarios/mod-enb-cells-2ca.conf
index bdc458b..1dbea73 100644
--- a/sysmocom/scenarios/mod-enb-cells-2ca.conf
+++ b/sysmocom/scenarios/mod-enb-cells-2ca.conf
@@ -10,7 +10,7 @@
       ncell_list: [0x01]
     - cell_id: 0x01
       pci: 0x02
-      dl_earfcn: 2850
+      dl_earfcn: 3050
       rf_port: 1
       scell_list: [0x00]
       ncell_list: [0x00]