Cellular: Fix information greentea tests for BC95 modem

Author: Mirela Chirica

features/cellular/TESTS/api/cellular_information/main.cpp

@@ -37,6 +37,8 @@
 
 #include "mbed.h"
 
+
+#include "AT_CellularInformation.h"
 #include "CellularConnectionFSM.h"
 #include "CellularDevice.h"
 #include "../../cellular_tests_common.h"
@@ -81,7 +83,9 @@ static void test_information_interface()
     TEST_ASSERT(info->get_manufacturer(buf, kbuf_size) == NSAPI_ERROR_OK);
     TEST_ASSERT(info->get_model(buf, kbuf_size) == NSAPI_ERROR_OK);
     TEST_ASSERT(info->get_revision(buf, kbuf_size) == NSAPI_ERROR_OK);
-    TEST_ASSERT(info->get_serial_number(buf, kbuf_size, CellularInformation::SN) == NSAPI_ERROR_OK);
+    TEST_ASSERT((info->get_serial_number(buf, kbuf_size, CellularInformation::SN) == NSAPI_ERROR_OK) ||
+               ((((AT_CellularInformation *)info)->get_device_error().errType == 3) &&    // 3 == CME error from the modem
+               (((AT_CellularInformation *)info)->get_device_error().errCode == 4)));     // 4 == "operation not supported"
 
     nsapi_error_t err = info->get_serial_number(buf, kbuf_size, CellularInformation::IMEI);
     TEST_ASSERT(err == NSAPI_ERROR_UNSUPPORTED || err == NSAPI_ERROR_OK);