mb/siemens/mc_ehl: Disable HS400 mode for eMMC

In order to achieve a stable eMMC interface disable the HS400 capability
of the host controller. This will result in an operating mode of maximum
HS200 (200 MHz single data rate) which leads to a more relaxed timing.

Change-Id: I0e125dd569b00f59ae0fd2f76169c4461291b47a
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62325
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>

0 files changed, 0 insertions, 0 deletions