etnaviv: free tgsi tokens when shader state is deleted

The tokens are allocated using tgsi_dup_tokens when the shader state is
created, so we need to free them explicitly when deleting the shader state.

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7367>
diff --git a/src/gallium/drivers/etnaviv/etnaviv_shader.c b/src/gallium/drivers/etnaviv/etnaviv_shader.c
index 47becee..5564a2f 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_shader.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_shader.c
@@ -450,6 +450,7 @@
          etna_destroy_shader(t);
    }
 
+   tgsi_free_tokens(shader->tokens);
    ralloc_free(shader->nir);
    FREE(shader);
 }