Coreboot video support.

	Coreboot video support.

	* grub-core/Makefile.core.def (vga): Extend to coreboot and multiboot.
	(vbe): Likewise.
	* grub-core/kern/i386/coreboot/startup.S: Include int.S.
	* grub-core/kern/i386/pc/startup.S (grub_bios_interrupt): Moved from
	here ...
	* grub-core/kern/i386/int.S: ... here.
	* grub-core/video/i386/pc/vbe.c: Updated includes.
	* grub-core/video/i386/pc/vga.c: Likewise.
	* include/grub/i386/coreboot/memory.h
	(GRUB_MEMORY_MACHINE_SCRATCH_ADDR): New definition.
	(GRUB_MEMORY_MACHINE_SCRATCH_SEG): Likewise.
	(GRUB_MEMORY_MACHINE_SCRATCH_SIZE): Likewise.
	* include/grub/i386/pc/int.h (GRUB_CPU_INT_FLAGS_DEFAULT) [!PCBIOS]:
	Disable interrupts.
	* include/grub/i386/pc/vga.h: Removed. All users updated.