eventlog: Add additional EC host events

Add additional EC host events for logging. Some of these should likely
never end up in the event log.

TEST=Manual on Samus. Trigger EC panic, verify that "Panic Reset in
previous boot" is seen in /var/log/eventlog.

Change-Id: I8b54409e1c596eb5ce692bdb83c8911a5070af62
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/252402
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
(cherry picked from commit 07eb0e002faadfee36642265591d912c485829d8)
Reviewed-on: https://chromium-review.googlesource.com/253520
2 files changed