i945: Reset IGD on boot

This is mostly necessary for reboot, but it doesn't hurt the boot process.
On reboot explicitely reset the integrated graphics, otherwise the VGABIOS
might not be able to reinitialize it properly, and you either have a still
of the last pre-reboot image, garbage or an empty screen, but no text-mode.

Change-Id: Ic3d6932fbaf720d88daaac7e4b09c3c0b9f0b0e2
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/1178
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
1 file changed