leds: ipaq-micro: fix sparse non static symbol warning

Fixes the following sparse warnings:

drivers/leds/leds-ipaq-micro.c:130:24: warning:
 symbol 'micro_leds_device_driver' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-ipaq-micro.c

@@ -127,7 +127,7 @@ static int micro_leds_remove(struct platform_device *pdev)
 	return 0;
 }
 
-struct platform_driver micro_leds_device_driver = {
+static struct platform_driver micro_leds_device_driver = {
 	.driver = {
 		.name    = "ipaq-micro-leds",
 	},