gma: Add `eDP' flag to Port_Config

Again, we assume that a port with panel controls attached is eDP.

Change-Id: Idd40b4258c08ba88ec7b0ab631e683aba848f9c1
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.sourcearcade.org/c/libgfxinit/+/466
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: Nico Huber <nico.h@gmx.de>
diff --git a/common/hw-gfx-gma.ads b/common/hw-gfx-gma.ads
index 4771dbe..db791ed 100644
--- a/common/hw-gfx-gma.ads
+++ b/common/hw-gfx-gma.ads
@@ -331,6 +331,7 @@
          Panel    : Panel_Control;
          Mode     : Mode_Type;
          Is_FDI   : Boolean;
+         Is_eDP   : Boolean;
          FDI      : DP_Link;
          DP       : DP_Link;
       end record;