leds: Fix potential leds-gpio oops

Call gpio_cansleep only after gpio_request succeeded avoiding an
oops.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Acked-by: David Brownell <[e-mail]>
Signed-off-by: Richard Purdie <[e-mail]>

drivers/leds/leds-gpio.c

···
 		cur_led = &pdata->leds[i];
 		led_dat = &leds_data[i];
 
+		ret = gpio_request(cur_led->gpio, cur_led->name);
+		if (ret < 0)
+			goto err;
+
 		led_dat->cdev.name = cur_led->name;
 		led_dat->cdev.default_trigger = cur_led->default_trigger;
 		led_dat->gpio = cur_led->gpio;
···
 		led_dat->active_low = cur_led->active_low;
 		led_dat->cdev.brightness_set = gpio_led_set;
 		led_dat->cdev.brightness = LED_OFF;
-
-		ret = gpio_request(led_dat->gpio, led_dat->cdev.name);
-		if (ret < 0)
-			goto err;
 
 		gpio_direction_output(led_dat->gpio, led_dat->active_low);