Change in coreboot[master]: device/pci_device.c: Improve pci_bridge_route() readability

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans, Angel Pons.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59131 )

Change subject: device/pci_device.c: Improve pci_bridge_route() readability
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Patch Set 2:

(2 comments)

File src/device/pci_device.c:

https://review.coreboot.org/c/coreboot/+/59131/comment/225b2d73_34cd5407 
PS1, Line 1337: u32 raw;
              : 		struct {
              : 			u8 primary;
              : 			u8 secondary;
              : 			u8 subordinate;
              : 			u8 _latency;
              : 		} __packed;
> This is not portable.

As PCI is a little endian bus, I think this is more portable than the existing code.

https://review.coreboot.org/c/coreboot/+/59131/comment/e220b9ba_d18410c6 
PS1, Line 1356: parent
> link

Done