usb: host: ohci-ppc-of: Fix refcount leak bug

In ohci_hcd_ppc_of_probe(), of_find_compatible_node() will return
a node pointer with refcount incremented. We should use of_node_put()
when it is not used anymore.
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NLiang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220617034637.4003115-1-windhl@126.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ohci-ppc-of.c

@@ -166,6 +166,7 @@ static int ohci_hcd_ppc_of_probe(struct platform_device *op)
 				release_mem_region(res.start, 0x4);
 		} else
 			pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__);
+		of_node_put(np);
 	}
 
 	irq_dispose_mapping(irq);