soc/amd/stoneyridge: Add RO_REGION_ONLY

We only need the apu firmware in the RO region when building
for ChromeOS. Adding it to the RW regions is a waste of space.

TEST=Build kahlee and use cbfstool to check for "apu/amdfw" sections.

Change-Id: Ieafe4a5ec4a5e3177e4e23fcf42afa2626a0b19f
Signed-off-by: Marc Jones <>
Tested-by: build bot (Jenkins) <>
Reviewed-by: Martin Roth <>
Reviewed-by: Aaron Durbin <>
1 file changed