leds: lp55xx: Use gpiod_set_value_cansleep()

Use gpiod_set_value_cansleep in the init_device function. Without this
change, the driver may print a warning if the LP55xx enable pin is
connected to a GPIO chip which can sleep (e.g. a GPIO expander):

WARNING: CPU: 0 PID: 2719 at drivers/gpio/gpiolib.c:3051 gpiod_set_value+0x64/0xbc
Signed-off-by: Stefan Eichenberger <eichest@gmail.com>
Link: https://lore.kernel.org/r/20230918143238.75600-1-eichest@gmail.comSigned-off-by: Lee Jones <lee@kernel.org>

drivers/leds/leds-lp55xx-common.c

@@ -442,9 +442,9 @@ int lp55xx_init_device(struct lp55xx_chip *chip)
 		gpiod_direction_output(pdata->enable_gpiod, 0);
 
 		gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable");
-		gpiod_set_value(pdata->enable_gpiod, 0);
+		gpiod_set_value_cansleep(pdata->enable_gpiod, 0);
 		usleep_range(1000, 2000); /* Keep enable down at least 1ms */
-		gpiod_set_value(pdata->enable_gpiod, 1);
+		gpiod_set_value_cansleep(pdata->enable_gpiod, 1);
 		usleep_range(1000, 2000); /* 500us abs min. */
 	}