Fix everest build issue

Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
diff --git a/tests/scripts/test_psa_constant_names.py b/tests/scripts/test_psa_constant_names.py
index 6c402dc..8ed0fee 100755
--- a/tests/scripts/test_psa_constant_names.py
+++ b/tests/scripts/test_psa_constant_names.py
@@ -163,6 +163,7 @@
     parser.add_argument('--include', '-I',
                         action='append', default=['tf-psa-crypto/include',
                                                   'tf-psa-crypto/drivers/builtin/include',
+                                                  'tf-psa-crypto/drivers/everest/include',
                                                   'include'],
                         help='Directory for header files')
     parser.add_argument('--keep-c',