PCI: microchip: Fix refcount leak in mc_pcie_init_irq_domains()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: PCI: microchip: Fix refcount leak in mc_pcie_init_irq_domains() of_get_next_child() returns a node pointer with refcount incremented, so we should use of_node_put() on it when we don't need it anymore. mc_pcie_init_irq_domains() only calls of_node_put() in the normal path, missing it in some error paths. Add missing of_node_put() to avoid refcount leak.

References

• https://git.kernel.org/stable/c/c0ad5c7e68d10f6f8ffb0f4329e3c19404fbca58
• https://git.kernel.org/stable/c/6cd5f93b5c6a66c68a91dbc604a78207252ecd43
• https://git.kernel.org/stable/c/880ece912b958a0c92cc0baa8e906fb9b49a4b53
• https://git.kernel.org/stable/c/f030304fdeb87ec8f1b518c73703214aec6cc24a