Replace zero by PSA_ALG_NONE in key derivation test function

Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index 531e82b..da6c1c4 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -8839,7 +8839,7 @@
     psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_DERIVE);
     psa_set_key_algorithm(&attributes, alg);
 
-    if (alg != 0) {
+    if (alg != PSA_ALG_NONE) {
         PSA_ASSERT(psa_key_derivation_setup(&operation, alg));
     }