Usefull to select between text mode which offers best compatibility with
payloads and gfx mode which makes the best-looking screen.
Also right now we have an unfortunate situation when qemu is in gfx mode
while most real systems use text mode.
Change-Id: Ifad7ba197875edfdd06eb932afeb5800229ef055
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5282
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>