perf: imx_perf: add support for i.MX91 platform

This will add compatible and identifier for i.MX91 platform.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240924061251.3387850-2-xu.yang_2@nxp.com
Signed-off-by: Will Deacon <will@kernel.org>

drivers/perf/fsl_imx9_ddr_perf.c

@@ -81,6 +81,10 @@ struct ddr_pmu {
 	int id;
 };
 
+static const struct imx_ddr_devtype_data imx91_devtype_data = {
+	.identifier = "imx91",
+};
+
 static const struct imx_ddr_devtype_data imx93_devtype_data = {
 	.identifier = "imx93",
 };
@@ -100,6 +104,7 @@ static inline bool is_imx95(struct ddr_pmu *pmu)
 }
 
 static const struct of_device_id imx_ddr_pmu_dt_ids[] = {
+	{ .compatible = "fsl,imx91-ddr-pmu", .data = &imx91_devtype_data },
 	{ .compatible = "fsl,imx93-ddr-pmu", .data = &imx93_devtype_data },
 	{ .compatible = "fsl,imx95-ddr-pmu", .data = &imx95_devtype_data },
 	{ /* sentinel */ }