radv: don't flush the VS when srcStageMask == TOP_OF_PIPE_BIT

The Vulkan specification says:

   "... an execution dependency with only VK_PIPELINE_STAGE_TOP_OF_-
    PIPE_BIT in the source stage mask will effectively not wait for
    any prior commands to complete."

Signed-off-by: Fredrik Höglund <fredrik@kde.org>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
1 file changed