Documentation: Add SandyBridge NRI feature matrix

Change-Id: I69b014430802de132c8d9b6c8409bc762b995468
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/27093
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed