pinctrl: abx500: mark pin config as generic

This is generic pin configuration, so add .is_generic.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/nomadik/pinctrl-abx500.c

@@ -1104,6 +1104,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
 static const struct pinconf_ops abx500_pinconf_ops = {
 	.pin_config_get = abx500_pin_config_get,
 	.pin_config_set = abx500_pin_config_set,
+	.is_generic = true,
 };
 
 static struct pinctrl_desc abx500_pinctrl_desc = {