3rdparty/libgfxinit: Update submodule pointer

Updates to current master.

This includes:
- A fix for textmode scaling on G45
- Refactor things to rely less on inline proving
- Increased width of modeline fields to 32 bits

Change-Id: Iab2915b747f6e4fa4e78eb28fea29bb3a9b3b687
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/30311
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3rdparty/libgfxinit

@@ -1 +1 @@
-Subproject commit 718c79bb0713b5b90c9cc44e03197dc777066e3d
+Subproject commit f70eddafbc2c6045a14e2f8bbb3273ee738fbaf7

src/drivers/intel/gma/hires_fb/gma.adb

@@ -60,8 +60,8 @@ is
 
       success : boolean;
 
-      min_h : pos16 := pos16'last;
-      min_v : pos16 := pos16'last;
+      min_h : pos32 := pos32'last;
+      min_v : pos32 := pos32'last;
    begin
       lightup_ok := 0;
 
@@ -75,8 +75,8 @@ is
             for i in Pipe_Index loop
                exit when configs (i).Port = Disabled;
 
-               min_h := pos16'min (min_h, configs (i).Mode.H_Visible);
-               min_v := pos16'min (min_v, configs (i).Mode.V_Visible);
+               min_h := pos32'min (min_h, configs (i).Mode.H_Visible);
+               min_v := pos32'min (min_v, configs (i).Mode.V_Visible);
             end loop;
 
             fb := configs (Primary).Framebuffer;