mbedtls: Run mbedtls_timing_self_test if MBEDTLS_TIMING_C

This allows us to verify the support for Mbed TLS timing on Mbed OS.

Note: The macros MBEDTLS_TIMING_C and MBEDTLS_TIMING_ALT are not
enabled by default and need to be additionally enabled to run this
test.

connectivity/mbedtls/tests/TESTS/mbedtls/selftest/main.cpp

@@ -35,6 +35,7 @@ using namespace utest::v1;
 #include "mbedtls/sha512.h"
 #include "mbedtls/entropy.h"
 #include "mbedtls/entropy_poll.h"
+#include "mbedtls/timing.h"
 
 #include <string.h>
 
@@ -65,6 +66,10 @@ MBEDTLS_SELF_TEST_TEST_CASE(mbedtls_sha512_self_test)
 MBEDTLS_SELF_TEST_TEST_CASE(mbedtls_entropy_self_test)
 #endif
 
+#if defined(MBEDTLS_TIMING_C)
+MBEDTLS_SELF_TEST_TEST_CASE(mbedtls_timing_self_test)
+#endif
+
 #else
 #warning "MBEDTLS_SELF_TEST not enabled"
 #endif /* MBEDTLS_SELF_TEST */
@@ -84,6 +89,10 @@ Case cases[] = {
     Case("mbedtls_entropy_self_test", mbedtls_entropy_self_test_test_case),
 #endif
 
+#if defined(MBEDTLS_TIMING_C)
+    Case("mbedtls_timing_self_test", mbedtls_timing_self_test_test_case),
+#endif
+
 #endif /* MBEDTLS_SELF_TEST */
 };