Patch merged into coreboot/master: Do not select SEABIOS_VGA_COREBOOT by default when building for QEMU

the following patch was just integrated into master:
commit 46dd467648564a48cd40de8ffb75270197c19f0c
Author: Arthur Heymans 
Date:   Tue Oct 25 17:11:16 2016 +0200

Do not select SEABIOS_VGA_COREBOOT by default when building for QEMU

On QEMU using SeaVGABIOS breaks some bootloaders, e.g. ISOLINUX does not
    work and GRUB works but is forced in txtmode, instead of graphical mode.

Change-Id: If31d4e5ed19cbeed3f8f9dbc23cc738dd55986e5
    Signed-off-by: Arthur Heymans 
    Reviewed-on: https://review.coreboot.org/17122
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber 
    Reviewed-by: Jonathan Neuschäfer 
    Reviewed-by: Paul Menzel

See https://review.coreboot.org/17122 for details.

-gerrit