gpiolib: gpio_request_one(): add missing gpio_free()

If GPIO request succeeds, but configuration fails, it should be released.

Signed-off-by: Aaro Koskinen <[e-mail]>
Acked-by: Eric Miao <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/gpio/gpiolib.c

···
 		err = gpio_direction_output(gpio,
 				(flags & GPIOF_INIT_HIGH) ? 1 : 0);
 
+	if (err)
+		gpio_free(gpio);
+
 	return err;
 }
 EXPORT_SYMBOL_GPL(gpio_request_one);