On i386, SOFTWARE_SUSPEND requires the CPU to have PSE support, but
DEBUG_PAGEALLOC disables PSE.  Thus, allowing both options to be enabled
simultaneously makes no sense.  This patch disables DEBUG_PAGEALLOC if
SOFTWARE_SUSPEND is enabled; it also displays a comment to briefly explain
why DEBUG_PAGEALLOC is missing in that case.

I have tested this patch against oldconfig and menuconfig on 2.6.11-bk2.
Signed-off-by: Barry K. Nathan <barryn@pobox.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>