sys-kernel/coreos-sources: enable XID 688 chip

[tormath1]

⚠️ Do not merge. This is an attempt to solve: flatcar/Flatcar#1749 and to propose this patch to the LKML at least on 6.12.y.

Testing done

sudo ebuild coreos-sources-6.12.32.ebuild clean prepare

EDIT: This has been proposed to the LKML: https://lore.kernel.org/stable/20250630142717.70619-1-mathieu.tortuyaux@gmail.com/T/#mac5169ce698593561cea55c73d27cee4d857dd3a

[github-actions]

Build action triggered: https://github.com/flatcar/scripts/actions/runs/15999482623

[ader1990]

According to https://github.com/torvalds/linux/commits/master/drivers/net/ethernet/realtek -> there might be the need to backport torvalds/linux@b11bff9 and torvalds/linux@b3593df and torvalds/linux@f75d1fb to be sure?

[tormath1]

According to https://github.com/torvalds/linux/commits/master/drivers/net/ethernet/realtek -> there might be the need to backport torvalds/linux@b11bff9 and torvalds/linux@b3593df and torvalds/linux@f75d1fb to be sure?

Thanks, this one: torvalds/linux@f75d1fb is the one backported here in this PR.

The two others, torvalds/linux@b3593df and torvalds/linux@b11bff9, are for resp. 0x689 and 0x681 so not sure.

[tormath1]

I think this is the missing piece: torvalds/linux@8989bad

[tormath1]

I am closing this. The patches have been proposed: https://lore.kernel.org/stable/20250630142717.70619-1-mathieu.tortuyaux@gmail.com/T/#mac5169ce698593561cea55c73d27cee4d857dd3a