intel: disable zero-copy TFP.

patch from Fedora. maybe someone can fix this later but for now
lets try and release Mesa so ajax can live his life and get Xorg 7.4 out.

src/mesa/drivers/dri/intel/intel_screen.c

@@ -391,10 +391,12 @@ intelHandleBufferAttach(__DRIdrawablePrivate *dPriv,
    intel_renderbuffer_set_region(rb, region);
 }
 
+#if 0
 static const __DRItexOffsetExtension intelTexOffsetExtension = {
    { __DRI_TEX_OFFSET },
    intelSetTexOffset,
 };
+#endif
 
 static const __DRItexBufferExtension intelTexBufferExtension = {
     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
@@ -407,7 +409,9 @@ static const __DRIextension *intelScreenExtensions[] = {
     &driSwapControlExtension.base,
     &driFrameTrackingExtension.base,
     &driMediaStreamCounterExtension.base,
+#if 0
     &intelTexOffsetExtension.base,
+#endif
     &intelTexBufferExtension.base,
     NULL
 };