clk: imx27: add missing of_node_put

for_each_compatible_node performs an of_node_get on each iteration, so a
break out of the loop requires an of_node_put.

The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@@
local idexpression n;
expression e;
@@

 for_each_compatible_node(n,...) {
   ...
(
   of_node_put(n);
|
   e = n
|
+  of_node_put(n);
?  break;
)
   ...
 }
... when != n
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/imx/clk-imx27.c

@@ -261,8 +261,10 @@ static void __init mx27_clocks_init_dt(struct device_node *np)
 		if (!of_device_is_compatible(refnp, "fsl,imx-osc26m"))
 			continue;
 
-		if (!of_property_read_u32(refnp, "clock-frequency", &fref))
+		if (!of_property_read_u32(refnp, "clock-frequency", &fref)) {
+			of_node_put(refnp);
 			break;
+		}
 	}
 
 	ccm = of_iomap(np, 0);