leds: lm3532: make bitfield 'enabled' unsigned

The bitfield 'enabled' should bit unsigned, so make it unsigned.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-lm3532.c

@@ -140,7 +140,7 @@ struct lm3532_led {
 	int ctrl_brt_pointer;
 	int num_leds;
 	int full_scale_current;
-	int enabled:1;
+	unsigned int enabled:1;
 	u32 led_strings[LM3532_MAX_CONTROL_BANKS];
 	char label[LED_MAX_NAME_SIZE];
 };