Nick Chen uploaded patch set #19 to this change.

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mb/google/volteer/variants/eldrid: add memory.c for ddr4 support

Add new memory.c to support DDR4 memory types.

Use the new meminit_ddr() and variant_memory_sku() for eldrid variant
code on memory.c

The initial settings override the baseboard from volteer and fine tune
gpio.c and overridetree.cb on eldrid's configuration.

BUG=b:161772961
TEST='emerge-volteer coreboot chromeos-bootimage' and verify that Eldrid
can boots. NOTE that tests the ddr4 side of the implementation.

Change-Id: I2c7b30093a8d85bac5aba5b83768af5eb36c4f70
Signed-off-by: Nick Chen <nick_xr_chen@wistron.corp-partner.google.com>
---
A src/mainboard/google/volteer/variants/eldrid/Makefile.inc
A src/mainboard/google/volteer/variants/eldrid/gpio.c
A src/mainboard/google/volteer/variants/eldrid/memory.c
M src/mainboard/google/volteer/variants/eldrid/overridetree.cb
4 files changed, 393 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/32/44632/19

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