cifs: Add CONFIG_CIFS_DEBUG and rename use of CIFS_DEBUG

This can reduce the size of the module by ~120KB which
could be useful for embedded systems.

$ size fs/cifs/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 388567	  34459	 100440	 523466	  7fcca	fs/cifs/built-in.o.new
 495970	  34599	 117904	 648473	  9e519	fs/cifs/built-in.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>

fs/cifs/Kconfig

@@ -122,9 +122,17 @@ config CIFS_ACL
 	    Allows fetching CIFS/NTFS ACL from the server.  The DACL blob
 	    is handed over to the application/caller.
 
+config CIFS_DEBUG
+	bool "Enable CIFS debugging routines"
+	default y
+	depends on CIFS
+	help
+	   Enabling this option adds helpful debugging messages to
+	   the cifs code which increases the size of the cifs module.
+	   If unsure, say Y.
 config CIFS_DEBUG2
 	bool "Enable additional CIFS debugging routines"
-	depends on CIFS
+	depends on CIFS_DEBUG
 	help
 	   Enabling this option adds a few more debugging routines
 	   to the cifs code which slightly increases the size of

fs/cifs/cifs_debug.h

@@ -18,7 +18,6 @@
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
 */
-#define CIFS_DEBUG		/* BB temporary */
 
 #ifndef _H_CIFS_DEBUG
 #define _H_CIFS_DEBUG
@@ -44,7 +43,7 @@ extern int cifsERROR;
  *	debug ON
  *	--------
  */
-#ifdef CIFS_DEBUG
+#ifdef CONFIG_CIFS_DEBUG
 
 /* information message: e.g., configuration, major event */
 #define cifsfyi(fmt, ...)						\