zephyr: Add chip info support in shimmed system driver
zephyr: Add chip info support in shimmed system driver

Add chip vendor, name, and revision information via cros_system driver
API in the shimmed system driver.

BUG=none
BRANCH=none
TEST=build & boot ec on volteer

Signed-off-by: Mulin Chao <6bbc5af053a1dfdc363be6857f30de4ac3bcbd16@nuvoton.com>
Signed-off-by: Wealian Liao <b980917544b235741b592c0c8e1e53fb264e55ff@nuvoton.corp-partner.google.com>
Change-Id: I09ff25d7ad07371900211426a15560ee61326b12
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2807478
Reviewed-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Reviewed-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Commit-Queue: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec