gpio: pisosr: Use gpiod_set_value_cansleep in pisosr_gpio_refresh()

This driver has .can_sleep flag set.
So the pisosr_gpio_get() can be called from contexts that can sleep.
Thus use the cansleep() variant in pisosr_gpio_refresh().

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-pisosr.c

···
 	mutex_lock(&gpio->lock);
 
 	if (gpio->load_gpio) {
-		gpiod_set_value(gpio->load_gpio, 1);
+		gpiod_set_value_cansleep(gpio->load_gpio, 1);
 		udelay(1); /* registers load time (~10ns) */
-		gpiod_set_value(gpio->load_gpio, 0);
+		gpiod_set_value_cansleep(gpio->load_gpio, 0);
 		udelay(1); /* registers recovery time (~5ns) */
 	}