tests-mbed_drivers-timerevent: perform test only if USTICKER support is enabled.

Author: mprse

TESTS/mbed_drivers/timerevent/main.cpp

@@ -23,6 +23,10 @@
 
 using namespace utest::v1;
 
+#if !DEVICE_USTICKER
+  #error [NOT_SUPPORTED] test not supported
+#endif
+
 #define TEST_DELAY_US 50000ULL
 
 class TestTimerEvent: public TimerEvent {