thermal: imx8mm: Support module autoloading

Add a missing MODULE_DEVICE_TABLE entry to support module autoloading.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Reviewed-by: NDong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1592380074-19222-1-git-send-email-Anson.Huang@nxp.com

drivers/thermal/imx8mm_thermal.c

@@ -220,6 +220,7 @@ static const struct of_device_id imx8mm_tmu_table[] = {
 	{ .compatible = "fsl,imx8mp-tmu", .data = &imx8mp_tmu_data, },
 	{ },
 };
+MODULE_DEVICE_TABLE(of, imx8mm_tmu_table);
 
 static struct platform_driver imx8mm_tmu = {
 	.driver = {