Change in coreboot[master]: soc/intel: Fix MCFG end bus number

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Change subject: soc/intel: Fix MCFG end bus number
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Patch Set 2:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/22616/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/68164/ : SUCCESS