Input: twl4030-vibra - fix sibling-node lookup

A helper purported to look up a child node based on its name was using
the wrong of-helper and ended up prematurely freeing the parent of-node
while searching the whole device tree depth-first starting at the parent
node.

Fixes: 64b9e4d803b1 ("input: twl4030-vibra: Support for DT booted kernel")
Fixes: e661d0a04462 ("Input: twl4030-vibra - fix ERROR: Bad of_node_put() warning")
Cc: stable <stable@vger.kernel.org>     # 3.7
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/twl4030-vibra.c

@@ -178,12 +178,14 @@ static SIMPLE_DEV_PM_OPS(twl4030_vibra_pm_ops,
 			 twl4030_vibra_suspend, twl4030_vibra_resume);
 
 static bool twl4030_vibra_check_coexist(struct twl4030_vibra_data *pdata,
-			      struct device_node *node)
+			      struct device_node *parent)
 {
+	struct device_node *node;
+
 	if (pdata && pdata->coexist)
 		return true;
 
-	node = of_find_node_by_name(node, "codec");
+	node = of_get_child_by_name(parent, "codec");
 	if (node) {
 		of_node_put(node);
 		return true;