swr/swr: Enable ARB_viewport_array
The rasterizer core supported ARB_viewport_array, but the swr layer connecting core to Gallium state tracker only allowed one viewport.
We add support for multiple viewports to swr layer.
The rasterizer core supported ARB_viewport_array, but the swr layer connecting core to Gallium state tracker only allowed one viewport.
We add support for multiple viewports to swr layer.