drivers/smmstore: Fix some issues

This fixes the following:
- Fix smmstore_read_region to actually read stuff
- Clean up the code a little
- Change the loglevel for non error messages to BIOS_DEBUG
- Use an incoherent rdev to potentially speed up reading access

TESTED on google/wolf with out of tree patch to hook up smmstore to
sb/intel/lynxpoint.

Change-Id: I629be25d2a9b65796ae8f7a700b6bdab57b91b22
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30432
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

0 files changed, 0 insertions, 0 deletions