Change in coreboot[master]: AGESA mainboards: Clean up IS_ENABLED fan control

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/21059 )

Change subject: AGESA mainboards: Clean up IS_ENABLED fan control
......................................................................

Patch Set 4:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/58870/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/14227/ : SUCCESS