Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/32128 )
Change subject: TEST current toolchain ......................................................................
Patch Set 3:
Maybe Julius can help on this: "src/soc/nvidia/tegra210/Makefile.inc:115: warning: overriding recipe for target '/cb-build/coreboot-toolchain.0/GOOGLE_SMAUG/cbfs/fallback/bootblock.raw.elf'" https://qa.coreboot.org/job/coreboot-toolchain/541/testReport/board/chromeos...
Yeah, I think that's an error / outdated line in the Makefile, actually. You could just remove the bootblock.raw.elf rule from src/soc/nvidia/tegra210/Makefile.inc. The default rule from the toplevel Makefile.inc should do the same thing.
However, I don't think that's the real error here, you're just blowing the bootblock budget. There is more free memory left in the T210 memlayout, you just have to shuffle it around a bit then you can increase the bootblock size.