Change in coreboot[master]: soc/intel/skylake: enable CGE for 8254 PIT for XTAL shutdown

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Change subject: soc/intel/skylake: enable CGE for 8254 PIT for XTAL shutdown
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Patch Set 4: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/17840/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/62859/ : SUCCESS