clk: cdce925: release child device nodes

of_get_child_by_name() returns device node with refcount incremented,
but there is no decrement in cdce925_probe(). The patch adds one.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/clk-cdce925.c

@@ -703,6 +703,7 @@ static int cdce925_probe(struct i2c_client *client,
 				0x12 + (i*CDCE925_OFFSET_PLL),
 				0x07, value & 0x07);
 		}
+		of_node_put(np_output);
 	}
 
 	/* Register output clock Y1 */