[coreboot-gerrit] Change in coreboot[master]: soc/intel/quark/spi.c: Explain a read in order to flush buffers

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Change subject: soc/intel/quark/spi.c: Explain a read in order to flush buffers
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/56461/ : SUCCESS