mb/supermicro/x9sae: Correct mapping of HDMI ports

The two HDMI ports on x9sae(-v) prove to be wired to HDMI2 and HDMI3.

Signed-off-by: Bill XIE <persmule@hardenedlinux.org>
Change-Id: I07870fd70612c9ed01a833f173b18053807ad2b7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65146
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

src/mainboard/supermicro/x9sae/gma-mainboard.ads

@@ -9,8 +9,8 @@ use HW.GFX.GMA.Display_Probing;
 private package GMA.Mainboard is
 
    ports : constant Port_List :=
-     (HDMI1,
+     (HDMI2,
-      HDMI2,
+      HDMI3,
       Analog,
       others => Disabled);