lockdep: make MAX_LOCKDEP_SUBCLASSES unconditionally visible

This define is needed by i2c_adapter_depth() to detect if we don't
exceed the maximum number of lock subclasses. Make it visible even
if lockdep is disabled.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Peter Rosin <peda@axentia.se>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

include/linux/lockdep.h

@@ -16,6 +16,8 @@ struct lockdep_map;
 extern int prove_locking;
 extern int lock_stat;
 
+#define MAX_LOCKDEP_SUBCLASSES		8UL
+
 #ifdef CONFIG_LOCKDEP
 
 #include <linux/linkage.h>
@@ -29,8 +31,6 @@ extern int lock_stat;
  */
 #define XXX_LOCK_USAGE_STATES		(1+3*4)
 
-#define MAX_LOCKDEP_SUBCLASSES		8UL
-
 /*
  * NR_LOCKDEP_CACHING_CLASSES ... Number of classes
  * cached in the instance of lockdep_map