The SGI 3.40 PROM includes a fix for the move of the init_task to
region 5, so specify that in sn_sal.h.  Unfortunately, the check for
the minimum required version happens *after* the hang/MCA that is
symptomatic of the bug, so this message also acts as an announcement
of the requirement.
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: David Mosberger <davidm@hpl.hp.com>