Skip time drifting test on FastModels targets

FastModels targets are simulator running on the x86 hosts.
As the nature of non-RealTime x86 OS and FastModels, timing accuracy is not guaranteed
So skipping the time drifting tests on FastModel targets

TESTS/mbed_drivers/ticker/main.cpp

@@ -104,6 +104,10 @@ void increment_multi_counter(void)
  */
 void test_case_1x_ticker()
 {
+#if defined(__ARM_FM)
+    TEST_SKIP_MESSAGE("FastModels not support time drifting test")
+#endif
+
     char _key[11] = { };
     char _value[128] = { };
     int expected_key = 1;
@@ -145,6 +149,10 @@ void test_case_1x_ticker()
  */
 void test_case_2x_ticker()
 {
+#if defined(__ARM_FM)
+    TEST_SKIP_MESSAGE("FastModels not support time drifting test")
+#endif
+
     char _key[11] = { };
     char _value[128] = { };
     int expected_key =  1;

TESTS/mbed_drivers/timeout/timeout_tests.h

@@ -389,6 +389,10 @@ private:
 template<typename T>
 void test_drift(void)
 {
+#if defined(__ARM_FM)
+    TEST_SKIP_MESSAGE("FastModels not support time drifting test")
+#endif
+
     char _key[11] = { };
     char _value[128] = { };
     int expected_key = 1;

TESTS/mbed_hal/common_tickers_freq/main.cpp

@@ -62,6 +62,10 @@ void ticker_event_handler_stub(const ticker_data_t *const ticker)
 /* Test that the ticker is operating at the frequency it specifies. */
 void ticker_frequency_test()
 {
+#if defined(__ARM_FM)
+    TEST_SKIP_MESSAGE("FastModels not support time drifting test")
+#endif
+
     char _key[11] = { };
     char _value[128] = { };
     int expected_key = 1;

TESTS/mbedmicro-rtos-mbed/basic/main.cpp

@@ -65,6 +65,10 @@ void update_tick_thread(Mutex *mutex)
  */
 void test(void)
 {
+#if defined(__ARM_FM)
+    TEST_SKIP_MESSAGE("FastModels not support time drifting test")
+#endif
+
     char _key[11] = { };
     char _value[128] = { };
     int expected_key = 1;