Suspend broadcom cards in order to stop their DMA.

	Suspend broadcom cards in order to stop their DMA.

	* grub-core/Makefile.am (KERNEL_HEADER_FILES): Add pci.h on x86 EFI.
	* grub-core/Makefile.core.def (kernel): Add pci.c on x86 EFI.
	(pci): Don't build on x86 EFI.
	* grub-core/bus/pci.c (grub_pci_find_capability): New function.
	* grub-core/kern/efi/mm.c (stop_broadcom) [__i386__ || __x86_64__]:
	New function.
	(grub_efi_finish_boot_services) [__i386__ || __x86_64__]: Call
	stop_broadcom if running on EFI.
	* include/grub/pci.h (GRUB_PCI_CLASS_NETWORK): New enum value.
	(GRUB_PCI_CAP_POWER_MANAGEMENT): Likewise.
	(GRUB_PCI_VENDOR_BROADCOM): Likewise.
	(grub_pci_find_capability): New proto.

	Also-By: Vladimir Serbinenko <phcoder@gmail.com>