Nami: Erase OCM flash for Akali
Nami: Erase OCM flash for Akali

This makes Akali EC check OCM flash and erase it if it's not empty
at start-up.

Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>

BUG=b:79985105
BRANCH=none
TEST=Verified OCM flash is erased at start-up on Akali.

Change-Id: If6c09be0a547313b10e4fd45ec4b3719f83abaa9
Reviewed-on: https://chromium-review.googlesource.com/1066932
Commit-Ready: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Tested-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Reviewed-by: Aaron Durbin <af0622ab041e8b0f8e5819838dcc93898196e71f@chromium.org>

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