Change in coreboot[master]: soc/intel/common: Add new IRQ module

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Nico Huber, Furquan Shaikh.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/49408 )

Change subject: soc/intel/common: Add new IRQ module
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Patch Set 27:

(3 comments)

File src/soc/intel/common/block/irq/irq.c:

https://review.coreboot.org/c/coreboot/+/49408/comment/8d9ead35_e627054f 
PS26, Line 91: used
> Nice use of a better data structure to make this cleaner! My original choice was obviously the fn_pi […]

Ack

https://review.coreboot.org/c/coreboot/+/49408/comment/1427dca4_d3a77b88 
PS26, Line 175: fn_pin_map
> Let me see if I can get rid of the EMPTY_FN ... […]

Ack

https://review.coreboot.org/c/coreboot/+/49408/comment/2e7f7d31_66cd7a64 
PS26, Line 342: soc_irq_constraints
> Since `assign_pci_irqs()` is called by SoC code, can we accept this list as an input parameter rathe […]

Ack