psa_information: improve code readability

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
diff --git a/tests/scripts/generate_psa_tests.py b/tests/scripts/generate_psa_tests.py
index 04c36f7..a6683f5 100755
--- a/tests/scripts/generate_psa_tests.py
+++ b/tests/scripts/generate_psa_tests.py
@@ -508,8 +508,7 @@
             key.alg.string, key.alg2.string,
         )
         dependencies = psa_information.finish_family_dependencies(dependencies, key.bits)
-        dependencies = psa_information.generate_description_dependencies(dependencies,
-                                                                         key.description)
+        dependencies += psa_information.generate_deps_from_description(key.description)
         dependencies = psa_information.fix_key_pair_dependencies(dependencies, 'BASIC')
         tc.set_dependencies(dependencies)
         tc.set_function('key_storage_' + verb)