These boards have a socketed CPU, and the PCI device ID for the iGPU
depends on the installed CPU. Specifying a default doesn't make sense.
Change-Id: Iee6749e4fb691f09664cc6ffb3cbf66e4230fa9c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54361
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>