Update CrOS EC naming used throughout the codebase

This updates all old references of Google EC with Chrome EC
equivalents. It has not been called "Google EC" or GEC for a long
time, so this just makes the usage more consistent with other
portions of the ChromeOS codebase.

TEST=Built and ran "mosys ec info" on link, snow, and kirby

Change-Id: I6c4dd7380280ffaf8f45164f76f794e731e92074
Reviewed-on: https://chromium-review.googlesource.com/171882
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
35 files changed