btrfs: derive maximum output size in the compression implementation

The value of max_out can be calculated from the parameters passed to the
compressors, which is number of pages and the page size, and we don't
have to needlessly pass it around.

Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 11a4eea..0d932b9 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -510,8 +510,7 @@
 					   pages,
 					   &nr_pages,
 					   &total_in,
-					   &total_compressed,
-					   BTRFS_MAX_COMPRESSED);
+					   &total_compressed);
 
 		if (!ret) {
 			unsigned long offset = total_compressed &