surfaceflinger: Disable async buffer (#1603)

This fix a mistake I made during my original reimplementation of SurfaceFlinger by disabling async buffer.

This fix a memory corruption on Super Mario All-Stars 3D (Super Mario Sunshine & Super
Mario Galaxy now go ingame).

Thanks to @gdkchan for tracing the memory corruption.

Ryujinx.HLE/HOS/Services/SurfaceFlinger/BufferQueueCore.cs

@@ -50,7 +50,7 @@ namespace Ryujinx.HLE.HOS.Services.SurfaceFlinger
             IsAbandoned              = false;
             OverrideMaxBufferCount   = 0;
             DequeueBufferCannotBlock = false;
-            UseAsyncBuffer           = true;
+            UseAsyncBuffer           = false;
             DefaultWidth             = 1;
             DefaultHeight            = 1;
             DefaultMaxBufferCount    = 2;