kfifo: Fix typo in comment

It's DECLARE_KFIFO, not DECLARED_KFIFO.
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/kfifo.h

@@ -81,7 +81,7 @@ union { \
 }
 
 /**
- * INIT_KFIFO - Initialize a kfifo declared by DECLARED_KFIFO
+ * INIT_KFIFO - Initialize a kfifo declared by DECLARE_KFIFO
  * @name: name of the declared kfifo datatype
  */
 #define INIT_KFIFO(name) \