CVE-2026-72026 irqchip/irq-riscv-imsic-early: Fix fwnode leak on state setup failure

In the Linux kernel, the following vulnerability has been resolved: irqchip/irq-riscv-imsic-early: Fix fwnode leak on state setup failure imsicearlyacpiinit allocates a firmware node before setting up the IMSIC state. If imsicsetupstate fails, the function returns without freeing the allocated...