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 <[e-mail]>
Signed-off-by: Xu Yang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Will Deacon <[e-mail]>

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

···
 $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 <[e-mail]>
···
           - fsl,imx8mm-ddr-pmu
           - fsl,imx8mn-ddr-pmu
           - fsl,imx8mp-ddr-pmu
+          - fsl,imx93-ddr-pmu
       - items:
           - enum:
               - fsl,imx8mm-ddr-pmu