vboot: Allow other platforms to use soft reboot workaround

Add a Kconfig value to enable other platforms to use the soft reboot
workaround.

TEST=Build and run on Galileo Gen2

Change-Id: I5a7ebd200229654128d367ecb50647ff69bb5258
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18798
Tested-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed