[coreboot-gerrit] Change in coreboot[master]: drivers/spi/winbond: Add function to lock flash's status register

[Patrick Rudolph (Code Review)]

Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/28697 )

Change subject: drivers/spi/winbond: Add function to lock flash's status register
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Patch Set 1:

Tested on Winbond W25Q128.
Status register lock bits can be written multiple times until this method is called.
All following calls will fail, as the status register bits won't change any more.