fs/ufs/super.c: remove unnecessary casting

Fix the following coccinelle warning:

  fs/ufs/super.c:1418:7-28: WARNING: casting value returned by memory allocation function to (struct ufs_inode_info *) is useless.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Evgeniy Dushistov <dushistov@mail.ru>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ufs/super.c

@@ -1415,9 +1415,11 @@ static struct kmem_cache * ufs_inode_cachep;
 static struct inode *ufs_alloc_inode(struct super_block *sb)
 {
 	struct ufs_inode_info *ei;
-	ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
+
+	ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS);
 	if (!ei)
 		return NULL;
+
 	ei->vfs_inode.i_version = 1;
 	return &ei->vfs_inode;
 }