CVE-2022-49714 irqchip/realtek-rtl: Fix refcount leak in map_interrupts

In the Linux kernel, the following vulnerability has been resolved: irqchip/realtek-rtl: Fix refcount leak in mapinterrupts offindnodebyphandle returns a node pointer with refcount incremented, we should use ofnodeput on it when not need anymore. This function doesn't call ofnodeput in error path...