[coreboot-gerrit] Change in coreboot[master]: mb/lenovo/{t60,z61t}: Convert to variant board

[Patrick Rudolph (Code Review)]

Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/34123 )

Change subject: mb/lenovo/{t60,z61t}: Convert to variant board
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Patch Set 2:

Please use an overwrite devicetree.