MBEDTLS_PSA_INJECT_ENTROPY: Skip incompatible tests

When MBEDTLS_PSA_INJECT_ENTROPY is enabled, we disable standard entropy
sources, so mbedtls_entropy_func() doesn't work out of the box. Disable
tests that rely on it. MBEDTLS_PSA_INJECT_ENTROPY is intended for PSA-only
environments anyway, so it doesn't matter if some legacy features don't work
normally.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_entropy.function b/tests/suites/test_suite_entropy.function
index 724542c..617c875 100644
--- a/tests/suites/test_suite_entropy.function
+++ b/tests/suites/test_suite_entropy.function
@@ -135,7 +135,7 @@
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
- * depends_on:MBEDTLS_ENTROPY_C
+ * depends_on:MBEDTLS_ENTROPY_C:!MBEDTLS_PSA_INJECT_ENTROPY
  * END_DEPENDENCIES
  */