staging/lustre/llite: Remove unnecessary check for NULL before iput()

iput() already checks for the inode being NULL, thus it's unnecessary to
check before calling.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/llite/llite_lib.c

@@ -591,7 +591,6 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
 
 	return err;
 out_root:
-	if (root)
 	iput(root);
 out_lock_cn_cb:
 	obd_fid_fini(sbi->ll_dt_exp->exp_obd);