Input: cobalt_btns - add missing MODULE_LICENSE

Export the module license and other information about the Cobalt
button module in order to avoid the following warning:

| WARNING: modpost: missing MODULE_LICENSE() in drivers/input/misc/cobalt_btns.o
Signed-off-by: NMartin Michlmayr <tbm@cyrius.com>
Acked-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

drivers/input/misc/cobalt_btns.c

@@ -148,6 +148,9 @@ static int __devexit cobalt_buttons_remove(struct platform_device *pdev)
 	return 0;
 }
 
+MODULE_AUTHOR("Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>");
+MODULE_DESCRIPTION("Cobalt button interface driver");
+MODULE_LICENSE("GPL");
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:Cobalt buttons");