Revert "build_kernel_image: drop 'nmi_watchdog=lapic'"

This reverts commit 5940f4a4adf056409672566b1c4d385f6d6f11c0.

Reason for revert: breaks signing; fix is coming soon

Original change's description:
> build_kernel_image: drop 'nmi_watchdog=lapic'
>
> The 'lapic' option was dropped a very very long time ago:
>
> 5f2b0ba4d94b x86, nmi_watchdog: Remove the old nmi_watchdog
>
> The only valid args here are "panic", "nopanic", "0", and "1", so the
> trailing ",lapic" text isn't doing anything.
>
> BUG=b:172222678
> TEST=platform_KernelErrorPaths.HARDLOCKUP
>
> Change-Id: I82ec736344374ef5037915b07ce6fdc89d56ed5e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2530315
> Reviewed-by: Mike Frysinger <vapier@chromium.org>
> Tested-by: Brian Norris <briannorris@chromium.org>
> Commit-Queue: Brian Norris <briannorris@chromium.org>

Bug: b:172222678
Exempt-From-Owner-Approval: reverting to unbreak build
Change-Id: I00691b0b73a240f1965a24f593cfd25aa2dd2303
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2538055
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: George Engelbrecht <engeg@google.com>
Commit-Queue: Brian Norris <briannorris@chromium.org>
1 file changed