mb/google/nissa/var/joxer: Configure descriptor for eMMC or UFS

Joxer will have both eMMC and UFS SKUs, which require different
settings in the descriptor. So update the descriptor at run-time based
on fw_config.

By default, the descriptor is configured for UFS. This configuration
still boots fine on eMMC SKUs, it just might cause problems with S0ix.

This is a temporary workaround. It will be removed once we've
implemented a proper solution for configuring the descriptor differently
for different SKUs.

BUG=b:238234376
TEST=Make an identical change for nivviks. On both nivviks (eMMC) and
nirwen (UFS), check that it boots and that the logs show the descriptor
being configured as expected.

Change-Id: I14232eb773936f2ecd183687208d332136935601
Signed-off-by: Reka Norman <rekanorman@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65870
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>

0 files changed, 0 insertions, 0 deletions