cros_bundle_firmware: Add default flashmap for link
cros_bundle_firmware: Add default flashmap for link

Provide a default flashmap for link.

This has just two sections: the coreboot region and the ME firmware
region.
BUG=chromium-os:36112
TEST=manual
Build and boot upstream U-Boot on link. See that it creates a valid
image which boots on link.

Change-Id: If54c11c2a99083d6b75c99e4b27e1ef109998153
Reviewed-on: https://gerrit.chromium.org/gerrit/38402
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-by: Che-Liang Chiou <57969107b634cf11cb64e9d768fd46929066adab@chromium.org>
Commit-Ready: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>
Tested-by: Simon Glass <c00b0378376498bd9cd974c388df8854c0131d27@chromium.org>

marineam/coreos-dev-util,coreos/dev-util,coreos/dev-util,coreos/dev-util,mgireesh05/dev-util,mgireesh05/dev-util,mgireesh05/dev-util,marineam/coreos-dev-util