pinctrl: intel: Add default case to intel_config_set_pull()

For the sake of symmetry with intel_config_get_pull(), add
a default case to the outer switch.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pinctrl/intel/pinctrl-intel.c

@@ -758,6 +758,10 @@ static int intel_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
 		}
 
 		break;
+
+	default:
+		ret = -EINVAL;
+		break;
 	}
 
 	if (!ret)