Change in coreboot[master]: soc/intel/cannonlake: Report driver strength by _DSM in eMMC ACPI device

[Kane Chen (Code Review)]

Hello build bot (Jenkins), Furquan Shaikh, Tim Wawrzynczak, Paul Menzel, Patrick Rudolph,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/40467

to look at the new patch set (#8).

Change subject: soc/intel/cannonlake: Report driver strength by _DSM in eMMC ACPI device
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soc/intel/cannonlake: Report driver strength by _DSM in eMMC ACPI device

According to doc 621880, it suggests setting 40 ohm in byte 185 in extCSD.

This commit provides _DSM method for driver to query driving strength.

TEST=mmc extcsd read |grep HS_TIMING and found bit[7:4] is set to 4
BUG=b:154159888

Signed-off-by: Kane Chen 
Change-Id: I1b4df8b0d1d2cad3a7f521ad47ee5a4b3320c767
---
M src/soc/intel/cannonlake/acpi/scs.asl
1 file changed, 53 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/67/40467/8