gma: Begin Alder Lake (ADL) integration

Alder Lake uses the same generation of igfx engine as Tiger Lake,
therefore the changes required to support ADL-P are minor. This patch
starts with PCI device detection.

Change-Id: Ia9ab283b388735c4dd01c710251057c12b90b18e
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/libgfxinit/+/70888
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/common/hw-gfx-gma.ads b/common/hw-gfx-gma.ads
index 37dec95..0454c0a 100644
--- a/common/hw-gfx-gma.ads
+++ b/common/hw-gfx-gma.ads
@@ -48,7 +48,8 @@
       Broxton,
       Skylake,
       Kabylake,
-      Tigerlake);
+      Tigerlake,
+      Alderlake);
 
    type CPU_Variant is (Normal, ULT, ULX);
 
@@ -59,7 +60,8 @@
       Lynx_Point,       -- Wildcat Point compatible
       Sunrise_Point,    -- Union Point compatible
       Cannon_Point,
-      Tiger_Point);
+      Tiger_Point,
+      Alder_Point);
 
    type Port_Type is
      (Disabled,