[PATCH] Kdump documentation update: ia64 portion

this patch fills in the portions for ia64 kexec.

Signed-off-by: Simon Horman <horms@verge.net.au>
Cc: "Zou, Nanhai" <nanhai.zou@intel.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>