Change in coreboot[master]: soc/intel/cannonlake: add gpio files to make

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/21283 )

Change subject: soc/intel/cannonlake: add gpio files to make
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Patch Set 4:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/14946/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/59671/ : SUCCESS