[S] Change in coreboot[master]: treewide: use helpers to check for enabled pci devices

[Angel Pons (Code Review)]

Attention is currently required from: Jeff Daly, Fabio Aiuto, Mariusz Szafrański, Suresh Bellampalli, Stefan Reinauer, Vanessa Eusebio.

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68102 )

Change subject: treewide: use helpers to check for enabled pci devices
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Patch Set 2: -Code-Review

(1 comment)

File src/southbridge/intel/lynxpoint/lpc.c:

https://review.coreboot.org/c/coreboot/+/68102/comment/0682d4b6_717d2dff 
PS2, Line 123: 		if (!is_enabled_pci(irq_dev))
This is equivalent to:

irq_dev->bus->dev->path.type != DEVICE_PATH_PCI || irq_dev->bus->secondary != 0

Whereas the original was:

irq_dev->path.type != DEVICE_PATH_PCI || irq_dev->bus->secondary != 0

Why involve the bus?