[PATCH] x86_64: Export end_pfn

Fixes

> if [ -r System.map -a -x /sbin/depmod ]; then /sbin/depmod -ae -F
> System.map  2. 6.14-rc1; fi
> WARNING: /lib/modules/2.6.14-rc1/kernel/drivers/char/agp/amd64-agp.ko
> needs unknown symbol end_pfn

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>