intel/common: compress VBT

It's pretty well compressible which helps when space is tight.
The code encodes the assumption that the VBT is 8kb or less. Haven't
seen a larger one yet.

TEST=build, see that vbt.bin is compressed, boot, check log that the
reported VBT size is correct.

Change-Id: Ie25bca21d9edc408f441a292bbe2ab0459948ec4
Signed-off-by: Patrick Georgi <>
Tested-by: build bot (Jenkins) <>
Reviewed-by: Aaron Durbin <>
2 files changed