debug: Add basic CLI commands for I/O and PCI

These are useful for debug on x86 systems.

BUG=chrome-os-partner:40635
BRANCH=none
TEST=boot on glados to cli and test ior/iow and pcir/pciw

Change-Id: Iebb8a28fb4c17b493b6ea76c3f39bec4607b9406
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/275864
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
3 files changed