build_kernel_image: drop nmi_watchdog=

The ",lapic" part was superfluous for a very long time. See
https://crrev.com/c/2530315, which was reverted at
https://crrev.com/c/2538055 for procedural reasons (the signer didn't
like the new command line). The signer has since been fixed.

The remaining piece (nmi_watchdog=panic)
(a) was never required for non-x86 systems, as they specified the
    "panic" behavior in their kernel configuration instead; and
(b) is no longer required for x86 systems (as of
    https://chromium-review.googlesource.com/q/Idd46b11e21ade10bf7f399055a7d462076137335)
    for the same reason.

All architectures are consistent now (where hardlockup detectors are
supported), and we can drop the command line entirely.

BUG=b:172222678
TEST=platform_KernelErrorPaths.HARDLOCKUP

Change-Id: I51c2b2c0fce25c52635d74ff9cc0894c070dd764
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2538358
Commit-Queue: Brian Norris <briannorris@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed