test/py: Fix broken 'notbuildconfigspec' marker

Consider the following test sample:

@pytest.mark.buildconfigspec('fit')
@pytest.mark.notbuildconfigspec('generate_acpi_table')
def test_sample(u_boot_console):

Whatever the argument of the 'notbuildconfigspec' is,
the test ends up being skipped with the message:

('/uboot/test/py/conftest.py', 463,
 'Skipped: .config feature "fit" enabled')
Signed-off-by: NCristian Ciocaltea <cristian.ciocaltea@gmail.com>
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

test/py/conftest.py

@@ -472,7 +472,7 @@ def setup_buildconfigspec(item):
         option = options.args[0]
         if not ubconfig.buildconfig.get('config_' + option.lower(), None):
             pytest.skip('.config feature "%s" not enabled' % option.lower())
-    for option in item.iter_markers('notbuildconfigspec'):
+    for options in item.iter_markers('notbuildconfigspec'):
         option = options.args[0]
         if ubconfig.buildconfig.get('config_' + option.lower(), None):
             pytest.skip('.config feature "%s" enabled' % option.lower())