[coreboot-gerrit] Change in coreboot[master]: superio/common: Add more ACPI methods

[Patrick Rudolph (Code Review)]

Hello Felix Held, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/37640

to look at the new patch set (#2).

Change subject: superio/common: Add more ACPI methods
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superio/common: Add more ACPI methods

* Make use of introduced SSDT config mode access
* Make use of introduced SSDT mutex
* Provide ACPI functions to safely access SIO config space
* Implement method to query LDN enable state
* Implement method to set LDN enable state
* Use introduced functions to implement _DIS and _STA in the device

Tested on Aspeed AST2500 and Linux 5.2.
Manually verified ACPI code that generates no errors in Linux.

Change-Id: I520b29de925f368cd71ff8f1f58d2d57d72eff8d
Signed-off-by: Patrick Rudolph 
---
M src/superio/common/generic.c
M src/superio/common/ssdt.c
2 files changed, 165 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/40/37640/2