Specify interface for wpa_cli status

Change-Id: Id504b1ea9e1e57fc242898327d5a9b1c9bae8f88
diff --git a/libraries/utils.robot b/libraries/utils.robot
index cd27aa4..8001b1d 100644
--- a/libraries/utils.robot
+++ b/libraries/utils.robot
@@ -95,7 +95,7 @@
     END
     FOR    ${i}    IN RANGE    70
         ${output}=    Login And Run Command On Remote System
-        ...    wpa_cli status | grep SUCCESS    ${ip}    ${user}
+        ...    wpa_cli -i ${iface} status | grep SUCCESS    ${ip}    ${user}
         ...    ${pass}    ${container_type}    ${container_name}
         ${passed}=    Run Keyword And Return Status    Should Contain    ${output}    SUCCESS
         Run Keyword If    ${passed}    Exit For Loop