gma: Get rid of Port_Config in Read_EDID()

We usually don't have the full Port_Config available when we want to
read the EDID. Also move this procedure one level up into GMA.

Change-Id: Ibdce83c6024d796c645dae6786c67206b5343402
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/17752
Reviewed-by: Reto Buerki <reet@codelabs.ch>
3 files changed
tree: d78b7aec24d17f70b054bd92c4ad86dd61b53941
  1. common/
  2. configs/
  3. .gitignore
  4. COPYING
  5. Makefile
  6. Makefile.inc
  7. TODO