nvc0: invalidate all buffers when switching pipe contexts

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c

@@ -636,6 +636,7 @@ nvc0_switch_pipe_context(struct nvc0_context *ctx_to)
       ctx_to->samplers_dirty[s] = ~0;
       ctx_to->textures_dirty[s] = ~0;
       ctx_to->constbuf_dirty[s] = (1 << NVC0_MAX_PIPE_CONSTBUFS) - 1;
+      ctx_to->buffers_dirty[s]  = ~0;
    }
 
    /* Reset tfb as the shader that owns it may have been deleted. */