arm64: dts: ti: k3-am62a7: Correct L2 cache size to 512KB

Per AM62Ax SoC datasheet[0] L2 cache is 512KB.

[0] https://www.ti.com/lit/gpn/am62a7 Page 1.

Fixes: 5fc6b1b6 ("arm64: dts: ti: Introduce AM62A7 family of SoCs")
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20230320044935.2512288-2-vigneshr@ti.comSigned-off-by: Nishanth Menon <nm@ti.com>

arch/arm64/boot/dts/ti/k3-am62a7.dtsi

@@ -97,7 +97,7 @@ L2_0: l2-cache0 {
 		compatible = "cache";
 		cache-unified;
 		cache-level = <2>;
-		cache-size = <0x40000>;
+		cache-size = <0x80000>;
 		cache-line-size = <64>;
 		cache-sets = <512>;
 	};