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.com


Signed-off-by: Will Deacon <will@kernel.org>