[SPARC]: envctrl: ERR_PTR() --> PTR_ERR()

Fix thinko in Christoph's changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/sbus/char/envctrl.c b/drivers/sbus/char/envctrl.c
index 1247f81..d765cc1 100644
--- a/drivers/sbus/char/envctrl.c
+++ b/drivers/sbus/char/envctrl.c
@@ -1117,7 +1117,7 @@
 
 	kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld");
 	if (IS_ERR(kenvctrld_task)) {
-		err = ERR_PTR(kenvctrld_task);
+		err = PTR_ERR(kenvctrld_task);
 		goto out_deregister;
 	}