f2fs: align f2fs maximum name length to linux based filesystem

The maximum filename length supported in linux is 255 characters.
So let's follow that.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 1a49b88..d4a171b 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -197,7 +197,7 @@
 	struct f2fs_dir_entry *de;
 	struct page *page;
 
-	if (dentry->d_name.len > F2FS_MAX_NAME_LEN)
+	if (dentry->d_name.len > F2FS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
 	de = f2fs_find_entry(dir, &dentry->d_name, &page);