[S] Change in coreboot[main]: drivers/intel/gma/Kconfig: Add VBT compression configuration entry

[Jérémy Compostella (Code Review)]

Attention is currently required from: Arthur Heymans, Jérémy Compostella, Martin L Roth, Matt DeVillier, Paul Menzel, Pratikkumar V Prajapati, Subrata Banik.

Hello Anil Kumar K, Paul Menzel, Pratikkumar V Prajapati, Subrata Banik, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/76816?usp=email

to look at the new patch set (#15).

Change subject: drivers/intel/gma/Kconfig: Add VBT compression configuration entry
......................................................................

drivers/intel/gma/Kconfig: Add VBT compression configuration entry

Introduce Kconfig choice to pick between lzma, lz4 and no compression
at all of the VBT binary.

If VBT is needed in romstage, it can be used to set VBT lz4
compression as an alternative to enabling lzma compression support.
Indeed, the extra lzma code needed to de-compress VBT undermines the
compression size reduction between lzma and lz4.

BUG=b:279173035
TEST=Verified that vbt.bin is lz4 compressed with
     VBT_CBFS_COMPRESSION_LZ4 and not compressed at all with
     VBT_CBFS_COMPRESSION_NONE

Change-Id: I1df6a96c2ec122f0ef8ee6a1e96ffbd621b14941
Signed-off-by: Jeremy Compostella 
---
M src/drivers/intel/gma/Kconfig
M src/drivers/intel/gma/Makefile.inc
2 files changed, 34 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/16/76816/15