Change in coreboot[master]: payloads: Add LinuxBoot payload in NERF mode

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Change subject: payloads: Add LinuxBoot payload in NERF mode
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/19942/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/65203/ : SUCCESS