Replace MBEDTLS_ECDH_C dependency in ssl-opt tests

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/tests/scripts/generate_tls13_compat_tests.py b/tests/scripts/generate_tls13_compat_tests.py
index 0d7e2b0..b869e94 100755
--- a/tests/scripts/generate_tls13_compat_tests.py
+++ b/tests/scripts/generate_tls13_compat_tests.py
@@ -385,9 +385,13 @@
                 'requires_config_enabled MBEDTLS_X509_RSASSA_PSS_SUPPORT')
 
         ec_groups = ['secp256r1', 'secp384r1', 'secp521r1', 'x25519', 'x448']
+        ffdh_groups = ['ffdhe2048', 'ffdhe8192']
 
         if any(x in ec_groups for x in self._named_groups):
-            ret.append('requires_config_enabled MBEDTLS_ECDH_C')
+            ret.append('requires_config_enabled PSA_WANT_ALG_ECDH')
+
+        if any(x in ffdh_groups for x in self._named_groups):
+            ret.append('requires_config_enabled PSA_WANT_ALG_FFDH')
 
         return ret