Change in coreboot[master]: sb/intel/common/spi.c: Add a SPI write protect function

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Change subject: sb/intel/common/spi.c: Add a SPI write protect function
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Patch Set 13: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/73534/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/27644/ : SUCCESS