gma: Add Pipe_Index to the Connectors.Post_On method

On GMCH targets the Pipe index needs to be programmed in the output
register.

Change-Id: I6a614a9359c95adb59a1b6d0e34febe302fcfbf8
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/25410
Reviewed-by: Nico Huber <nico.h@gmx.de>
diff --git a/common/haswell_shared/hw-gfx-gma-connectors.adb b/common/haswell_shared/hw-gfx-gma-connectors.adb
index 2b29f99..e4980f1 100644
--- a/common/haswell_shared/hw-gfx-gma-connectors.adb
+++ b/common/haswell_shared/hw-gfx-gma-connectors.adb
@@ -49,7 +49,8 @@
    end Pre_On;
 
    procedure Post_On
-     (Port_Cfg : in     Port_Config;
+     (Pipe     : in     Pipe_Index;
+      Port_Cfg : in     Port_Config;
       PLL_Hint : in     Word32;
       Success  :    out Boolean)
    is