i915: Make batchbuffers larger.

src/gallium/winsys/dri/intel/intel_batchbuffer.c

@@ -65,7 +65,7 @@ intel_batchbuffer_reset(struct intel_batchbuffer *batch)
    driBOUnrefUserList(batch->list);
    driBOResetList(batch->list);
 
-   batch->size = 4096; // ZZZ JB batch->intel->intelScreen->maxBatchSize;
+   batch->size = 4 * 4096; // ZZZ JB batch->intel->intelScreen->maxBatchSize;
    driBOData(batch->buffer, batch->size, NULL, NULL, 0);
 
    /*

src/gallium/winsys/dri/intel/intel_screen.c

@@ -200,7 +200,7 @@ intelCreatePools(__DRIscreenPrivate * sPriv)
 						DRM_BO_FLAG_MEM_TT,
 						DRM_BO_FLAG_EXE |
 						DRM_BO_FLAG_MEM_TT,
-						4096, //intelScreen->maxBatchSize,
+						4 * 4096, //intelScreen->maxBatchSize,
 						1, 40, 16*16384, 0,
 						intelScreen->fMan);
 #endif