intel/skylake: Add function to read state of Deep S5

Add a function to read the current state of Deep S5 configuration
and indicate if it is enabled (for AC and/or DC) or disabled.

This is similar to the existing function that checks Deep S3
enable state.

BUG=b:36042662
BRANCH=none
TEST=tested with subsequent commits to check Deep S5 state at boot
and filter event log messages if it is enabled.

Change-Id: I4b60fb99a99952cb3ca6be29f257bb5894ff5a52
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/18663
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

0 files changed, 0 insertions, 0 deletions