arm64: dts: imx95: correct L3Cache cache-sets

The L3Cache size is 512KB.
Size = Cache Line Size(64) * num sets(512) * Assoc(0x10).

Correct the number of Cache sets.

Fixes: 5e3cbb8e ("arm64: dts: freescale: add i.MX95 basic dtsi")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>