dt-bindings: perf: fsl-imx-ddr: Add i.MX93 compatible

i.MX93 ddr pmu shares the same device node format as i.MX8. This will
add a compatible for i.MX93 and modify the title.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20230418102910.2065651-2-xu.yang_2@nxp.comSigned-off-by: Will Deacon <will@kernel.org>

Documentation/devicetree/bindings/perf/fsl-imx-ddr.yaml

@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/perf/fsl-imx-ddr.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Freescale(NXP) IMX8 DDR performance monitor
+title: Freescale(NXP) IMX8/9 DDR performance monitor
 
 maintainers:
   - Frank Li <frank.li@nxp.com>
@@ -19,6 +19,7 @@ properties:
           - fsl,imx8mm-ddr-pmu
           - fsl,imx8mn-ddr-pmu
           - fsl,imx8mp-ddr-pmu
+          - fsl,imx93-ddr-pmu
       - items:
           - enum:
               - fsl,imx8mm-ddr-pmu