Rename WARN() to WARNING() to clear the namespace

We want to use WARN() as a variant of WARN_ON(), however a few drivers are
using WARN() internally.  This patch renames these to WARNING() to avoid the
namespace clash.  A few cases were defining but not using the thing, for those
cases I just deleted the definition.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Greg KH <greg@kroah.com>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/usb/gadget/at91_udc.h b/drivers/usb/gadget/at91_udc.h
index a973f2a..c65d622 100644
--- a/drivers/usb/gadget/at91_udc.h
+++ b/drivers/usb/gadget/at91_udc.h
@@ -171,7 +171,7 @@
 #endif
 
 #define ERR(stuff...)		pr_err("udc: " stuff)
-#define WARN(stuff...)		pr_warning("udc: " stuff)
+#define WARNING(stuff...)	pr_warning("udc: " stuff)
 #define INFO(stuff...)		pr_info("udc: " stuff)
 #define DBG(stuff...)		pr_debug("udc: " stuff)