OMAPFB: add missing MODULE_ALIAS()

without MODULE_ALIAS(), omapfb won't get loaded
automatically.
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/fbdev/omap2/omapfb/omapfb-main.c

@@ -2651,6 +2651,7 @@ module_param_named(mirror, def_mirror, bool, 0);
 
 module_platform_driver(omapfb_driver);
 
+MODULE_ALIAS("platform:omapfb");
 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
 MODULE_DESCRIPTION("OMAP2/3 Framebuffer");
 MODULE_LICENSE("GPL v2");