[PATCH] i386: touch softlockup during backtracing

Sometimes the soft watchdog fires after we're done oopsing.
See http://projects.info-pull.com/mokb/MOKB-25-11-2006.html

 for an example.

AK: changed to touch_nmi_watchdog()

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>