radv: Skip already signalled fences.
radv: Skip already signalled fences.

If the user created a fence with VK_FENCE_CREATE_SIGNALED_BIT set, we
shouldn't fail to wait for a fence if it was not submitted since that is
not necessary.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler