perf/imx_ddr: Add MODULE_DEVICE_TABLE

This is required for automatic probing when driver is built as a module.

Fixes: 9a66d36c ("drivers/perf: imx_ddr: Add DDR performance counter support to perf")
Acked-by: Frank Li <frank.li@nxp.com>
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Will Deacon <will@kernel.org>

drivers/perf/fsl_imx8_ddr_perf.c

@@ -47,6 +47,7 @@ static const struct of_device_id imx_ddr_pmu_dt_ids[] = {
 	{ .compatible = "fsl,imx8m-ddr-pmu",},
 	{ /* sentinel */ }
 };
+MODULE_DEVICE_TABLE(of, imx_ddr_pmu_dt_ids);
 
 struct ddr_pmu {
 	struct pmu pmu;