Omit RSA key generation test if no strong entropy is present

The RSA key generation test needs strong entropy to succeed. This commit captures the presence of a strong entropy
source in a preprocessor flag and only runs the key generation test if that flag is set.
diff --git a/tests/suites/test_suite_entropy.data b/tests/suites/test_suite_entropy.data
index 5cff399..bf9ce49 100644
--- a/tests/suites/test_suite_entropy.data
+++ b/tests/suites/test_suite_entropy.data
@@ -52,10 +52,14 @@
 Check NV seed manually #3
 entropy_nv_seed:"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
 
-Entropy self test
-depends_on:!MBEDTLS_TEST_NULL_ENTROPY
+Entropy self test (with strong entropy)
+depends_on:!MBEDTLS_TEST_NULL_ENTROPY:MBEDTLS_ENTROPY_HAVE_STRONG
 entropy_selftest:0
 
+Entropy self test (without strong entropy)
+depends_on:!MBEDTLS_TEST_NULL_ENTROPY:!MBEDTLS_ENTROPY_HAVE_STRONG
+entropy_selftest:1
+
 Entropy self test (MBEDTLS_TEST_NULL_ENTROPY)
 depends_on:MBEDTLS_TEST_NULL_ENTROPY
 entropy_selftest:1
diff --git a/tests/suites/test_suite_rsa.function b/tests/suites/test_suite_rsa.function
index e9ae1bf..f64e1a7 100644
--- a/tests/suites/test_suite_rsa.function
+++ b/tests/suites/test_suite_rsa.function
@@ -658,7 +658,7 @@
 }
 /* END_CASE */
 
-/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C */
+/* BEGIN_CASE depends_on:MBEDTLS_CTR_DRBG_C:MBEDTLS_ENTROPY_C:MBEDTLS_ENTROPY_HAVE_STRONG */
 void mbedtls_rsa_gen_key( int nrbits, int exponent, int result)
 {
     mbedtls_rsa_context ctx;