broadcom/vc4: Expose PIPE_CAP_TILE_RASTER_ORDER
Because vc4 can control the order that tiles are rasterized in, we can use it to implement overlapping blits using normal drawing and GL_ARB_texture_barrier, as long as we can tell the kernel what order to render the tiles in. v2: Fix on the simulator. v3: Add the cap (disabled) to other drivers, add rst docs for the cap. v4: Rebase on PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS v5: Split from the core gallium commit, drop some unnecessary code related to glBlitFramebuffer(), fix a crash with clears before state has been bound.
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