bcachefs: Don't decrease BTREE_ITER_MAX when LOCKDEP=y

Running with fewer max btree paths doesn't work anymore when replication
is enabled - as we've added e.g. the freespace and bucket gens btrees,
we naturally end up needing more btree paths.

This is an issue with lockdep, we end up taking more locks than lockdep
will track (the MAX_LOCKD_DEPTH constant). But bcachefs as merged does
not yet support lockdep anyways, so we can leave that for later.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/btree_types.h

@@ -363,11 +363,7 @@ struct btree_insert_entry {
 	unsigned long		ip_allocated;
 };
 
-#ifndef CONFIG_LOCKDEP
 #define BTREE_ITER_MAX		64
-#else
-#define BTREE_ITER_MAX		32
-#endif
 
 struct btree_trans_commit_hook;
 typedef int (btree_trans_commit_hook_fn)(struct btree_trans *, struct btree_trans_commit_hook *);