Add flashrom EC support

Current flashrom module only support reading/writing BIOS. To enable EC
FAFT, let's add flashrom EC support.

BUG=chrome-os-partner:9188
TEST=Run firmware_CorruptFwBodyA and it still works.
     Manual test it can corrupt and restore EC.

Change-Id: I6e20e0e1b00749b5448490f841f9e1ae6a9c6ec4
Reviewed-on: https://gerrit.chromium.org/gerrit/23031
Reviewed-by: Tom Wai-Hong Tam <[email protected]>
Tested-by: Vic Yang <[email protected]>
Commit-Ready: Vic Yang <[email protected]>
2 files changed