lima: Ensure jobs initialized before calling lima_job_fini()

To avoid crash during cleanup if lima_context_create fails.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7196
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18407>

src/gallium/drivers/lima/lima_context.c

@@ -139,7 +139,8 @@ lima_context_destroy(struct pipe_context *pctx)
    struct lima_context *ctx = lima_context(pctx);
    struct lima_screen *screen = lima_screen(pctx->screen);
 
-   lima_job_fini(ctx);
+   if (ctx->jobs)
+      lima_job_fini(ctx);
 
    for (int i = 0; i < lima_ctx_buff_num; i++)
       pipe_resource_reference(&ctx->buffer_state[i].res, NULL);