hw/dma: Pass parent object to i8257_dma_init()

Set I8257 instances parent (migration isn't affected).

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240213114426.87836-1-philmd@linaro.org>
8 files changed