Add Samsung K4E6E304EB 4G LPDDR3 SDRAM for elm-rev1 SKU2

BUG=none
BRANCH=none
TEST=emerge-elm coreboot

Change-Id: I43ea6f07f5e337ca3bc5c5c4b3d56c89e5e0ca98
Signed-off-by: PH Hsu <ph.hsu@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/338212
Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
3 files changed