i8259: Convert to qdev
This key cleanup step requires to move the IRQ debugging bit from i8259_set_irq directly to the per-PIC pic_set_irq, to pass the PIC parameters (I/O base, ELCR address and mask, master/slave mode) as qdev properties, and to interconnect the PICs with their environment via GPIO pins. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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