flapjack: Customize EOC according to battery specification
flapjack: Customize EOC according to battery specification

The EOC should be set according to the battery specifications
of different projects.

BUG=b:128891165
BRANCH=none
TEST=Do a full charge test

Change-Id: I073a246e7694f277929f3159bb4d8692ac772b58
Reviewed-on: https://chromium-review.googlesource.com/1559096
Commit-Ready: YH Lin <a608809fda0b3a5e5ffc78f5b79106a21e96e6dd@chromium.org>
Tested-by: YH Lin <a608809fda0b3a5e5ffc78f5b79106a21e96e6dd@chromium.org>
Reviewed-by: YH Lin <a608809fda0b3a5e5ffc78f5b79106a21e96e6dd@chromium.org>
Reviewed-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>

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