Shaunak Saha uploaded patch set #7 to this change.

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mb/google/volteer: Implement variant_devtree_update for volteer sku's

HybridStorageMode FSP UPD needs to be set only for optane storage.
Enabling HybridStorageMode causes some extra delay in FspSiliconInit due
to HECI command and hence is avoided for NVMe and SATA scenerios. This
change disables "HybridStorageMode" default from baseboard devicetree.
Any volteer variant which is using optane should enable FSP UPD
"HybridStorageMode" from the overridetree.cb file. This change also
provides an implementation of variant_devtree_update() for volteer that
enables HybridStorageMode for SKU ID = 3 and 5.

BUG=b:158573805
TEST=Verify HybridStorageMode is disabled when SKU ID != 3 or 5 and
enabled for those 2 sku's only.

Signed-off-by: Shaunak Saha <shaunak.saha@intel.com>
Change-Id: I5c3bcfafe1710155bb47f706c3568dd9500c1975
---
M src/mainboard/google/volteer/Makefile.inc
A src/mainboard/google/volteer/ramstage.c
M src/mainboard/google/volteer/variants/baseboard/devicetree.cb
M src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h
M src/mainboard/google/volteer/variants/volteer/Makefile.inc
A src/mainboard/google/volteer/variants/volteer/variant.c
6 files changed, 38 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/61/44261/7

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