vboot: remove uses of vboot2_verify_firmware()

The vboot mechanism will be implemented within the program loader
subsystem to make it transparent to mainboards and chipsets.

Change-Id: Icd0bdcba06cdc30591f9b25068b3fa3a112e58fb
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10094
Tested-by: build bot (Jenkins)
12 files changed