Change in coreboot[master]: soc/amd: Throw an error if FWM_POSITION_INDEX is empty

[Bao Zheng (Code Review)]

Attention is currently required from: Bao Zheng, Jason Glenesk, Marshall Dawson, Zheng Bao.
Hello build bot (Jenkins), Jason Glenesk, Patrick Georgi, Martin Roth, Marshall Dawson, Zheng Bao, Felix Held,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/49855

to look at the new patch set (#7).

Change subject: soc/amd: Throw an error if FWM_POSITION_INDEX is empty
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soc/amd: Throw an error if FWM_POSITION_INDEX is empty

The empty string causes an undetectable build error.

Filter out the board which doesn't define this variable. A great odds that
the reason is the board doesn't set a valid ROM size.

Change-Id: Iade1961460285acdec245c553c7b84014c30c267
Signed-off-by: Zheng Bao 
---
M src/soc/amd/cezanne/Makefile.inc
M src/soc/amd/picasso/Makefile.inc
2 files changed, 6 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/55/49855/7