leds: fix platform driver hotplug/coldplug

Since 43cc71eed1, the platform
modalias is prefixed with "platform:". Add MODULE_ALIAS() to the
hotpluggable platform LED drivers, to re-enable auto loading.

[dbrownell@users.sourceforge.net: more drivers, registration fixes]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/leds/leds-atmel-pwm.c

@@ -132,6 +132,9 @@ static int __exit pwmled_remove(struct platform_device *pdev)
 	return 0;
 }
 
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:leds-atmel-pwm");
+
 static struct platform_driver pwmled_driver = {
 	.driver = {
 		.name =		"leds-atmel-pwm",