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 <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/clk-cdce925.c

···
 				0x12 + (i*CDCE925_OFFSET_PLL),
 				0x07, value & 0x07);
 		}
+		of_node_put(np_output);
 	}
 
 	/* Register output clock Y1 */