[PATCH] mmconfig: Move e820 check into pci_mmcfg_reject_broken()

This is just cleanup. It moves to e820 check into pci_mmcfg_reject_broken().

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>