gpio-poweroff: Use gpiod_set_value_cansleep

The power-off call is done in a context that must be able to sleep, so
use gpiod_set_value_cansleep instead of the atomic gpiod_set_value call.

This fixes a kernel warning at shutdown when the gpio is controlled
through an IO expander for example.
Signed-off-by: NMike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: NSebastian Reichel <sebastian.reichel@collabora.co.uk>

drivers/power/reset/gpio-poweroff.c

@@ -35,11 +35,11 @@ static void gpio_poweroff_do_poweroff(void)
 	gpiod_direction_output(reset_gpio, 1);
 	mdelay(100);
 	/* drive inactive, also active->inactive edge */
-	gpiod_set_value(reset_gpio, 0);
+	gpiod_set_value_cansleep(reset_gpio, 0);
 	mdelay(100);
 
 	/* drive it active, also inactive->active edge */
-	gpiod_set_value(reset_gpio, 1);
+	gpiod_set_value_cansleep(reset_gpio, 1);
 
 	/* give it some time */
 	mdelay(timeout);