vbutil_kernel: Add enum for the mips architecture
vbutil_kernel: Add enum for the mips architecture

BUG=chromium:327749
TEST=emerge vboot_reference
BRANCH=none
Change-Id: I627636d8433c0a8cdbd2c7b24cc405a41173658f
Reviewed-on: https://chromium-review.googlesource.com/199993
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: Gaurav Shah <2987db6a10bcfe664554a372d01e80df7fd325a3@chromium.org>
Commit-Queue: Gaurav Shah <2987db6a10bcfe664554a372d01e80df7fd325a3@chromium.org>

ccaapton/vboot_reference,coreboot/vboot,coreboot/vboot,geekboxzone/mmallow_external_vboot_reference,acorn-marvell/vboot_reference,coreboot/vboot,ccaapton/vboot_reference,geekboxzone/mmallow_external_vboot_reference,coreboot/vboot,geekboxzone/mmallow_external_vboot_reference,coreboot/vboot,geekboxzone/mmallow_external_vboot_reference,ccaapton/vboot_reference,acorn-marvell/vboot_reference,acorn-marvell/vboot_reference,acorn-marvell/vboot_reference,geekboxzone/mmallow_external_vboot_reference,ccaapton/vboot_reference