ARM OMAP2+ GPMC: don't undef DEBUG

OMAP2+ GPMC driver undefines DEBUG, which makes it unnecessarily
hard to turn DEBUG on. Remove the offending lines.
Signed-off-by: NRobert ABEL <rabel@cit-ec.uni-bielefeld.de>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRoger Quadros <rogerq@ti.com>

drivers/memory/omap-gpmc.c

@@ -12,8 +12,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#undef DEBUG
-
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/init.h>