Initialise VGA video on qemu ourselves.

	Initialise VGA video on qemu ourselves.

	* boot/i386/qemu/boot.S: Don't call 0xc000.
	* conf/i386-qemu.rmk (kern/i386/qemu/init.c_DEPENDENCIES): New variable.
	(kernel_img_SOURCES): Add kern/i386/qemu/init.c and bus/pci.c.
	(kernel_img_HEADERS): Add pci.h.
	* conf/i386.rmk (pkglib_MODULES) [qemu]: Remove pci.mod.
	* configure.ac: Force unifont on qemu and yeeloong.
	* include/grub/i386/qemu/kernel.h (grub_qemu_init_cirrus): New proto.
	(grub_vga_palette_write): Use correct register.
	* kern/i386/coreboot/init.c (grub_machine_init) [GRUB_MACHINE_QEMU]:
	Call grub_qemu_init_cirrus.
	* kern/i386/qemu/init.c: New file.
	* term/i386/pc/vga_text.c (inc_y): Never read outside the screen.

	* commands/videotest.c (grub_cmd_videotest): Handle double buffering.