clk: kirkwood: fix refcount leak in kirkwood_clk_init()

The of_find_compatible_node() returns a node pointer with refcount
incremented, but there is the lack of use of the of_node_put() when
done. Add the missing of_node_put() to release the refcount.

Signed-off-by: Yangtao Li <[e-mail]>
Reviewed-by: Gregory CLEMENT <[e-mail]>
Fixes: 58d516ae95cb ("clk: mvebu: kirkwood: maintain clock init order")
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/mvebu/kirkwood.c

···
 	if (cgnp) {
 		mvebu_clk_gating_setup(cgnp, kirkwood_gating_desc);
 		kirkwood_clk_muxing_setup(cgnp, kirkwood_mux_desc);
+
+		of_node_put(cgnp);
 	}
 }
 CLK_OF_DECLARE(kirkwood_clk, "marvell,kirkwood-core-clock",