UPSTREAM: siemens/mc_apl1: Select DDR50 mode for eMMC

To increase the lifetime of the circuit, it is necessary to reduce the
eMMC speed to DDR50 mode.

BUG=none
BRANCH=none
TEST=none

Change-Id: I92f9436584783d2cc303f63e12151420460e897f
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: 16ebc9831f156a03bd5ecd21e9365c09bfc43554
Original-Change-Id: I40658b44a99e6600ed00950a1a177961f0055e7a
Original-Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Original-Reviewed-on: https://review.coreboot.org/28283
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Original-Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://chromium-review.googlesource.com/1188674
Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
1 file changed