x86/i8259: Mark legacy PIC interrupts with IRQ_LEVEL
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.231 by commit 8770cd9d7c14aa99c255a0d08186f0be953e1638, it was introduced in version v2.6.18 by commit a4633adcdbc15ac51afcd0e1395de58cee27cf92. For more details please see the references link.