mtd: omap_elm: Fix module alias

Remove extra space after the "platform:" prefix and make the alias matches
driver name.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/omap_elm.c

@@ -574,5 +574,5 @@ module_platform_driver(elm_driver);
 
 MODULE_DESCRIPTION("ELM driver for BCH error correction");
 MODULE_AUTHOR("Texas Instruments");
-MODULE_ALIAS("platform: elm");
+MODULE_ALIAS("platform:" DRIVER_NAME);
 MODULE_LICENSE("GPL v2");