pinctrl: baytrail: Enable pin configuration setting for GPIO chip

It appears that pin configuration for GPIO chip hasn't been enabled yet
due to absence of ->set_config() callback.

Enable it here for Intel Baytrail.

Fixes: c501d0b1 ("pinctrl: baytrail: Add pin control operations")
Depends-on: 2956b5d9 ("pinctrl / gpio: Introduce .set_config() callback for GPIO chips")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pinctrl/intel/pinctrl-baytrail.c

@@ -1286,6 +1286,7 @@ static const struct gpio_chip byt_gpio_chip = {
 	.direction_output	= byt_gpio_direction_output,
 	.get			= byt_gpio_get,
 	.set			= byt_gpio_set,
+	.set_config		= gpiochip_generic_config,
 	.dbg_show		= byt_gpio_dbg_show,
 };