[XS] Change in coreboot[main]: mb/google/nissa/var/yaviks: Disable PMC mux conn1 by FW_CONFIG

[Chen Wisley (Code Review)]

Chen Wisley has abandoned this change. ( https://review.coreboot.org/c/coreboot/+/78119?usp=email )

Change subject: mb/google/nissa/var/yaviks: Disable PMC mux conn1 by FW_CONFIG
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Abandoned

submit another CL (https://review.coreboot.org/c/coreboot/+/78175)