ARM: dts: socfpga: update L2 tag and data latency

Sets the appropriate L2-cache latencies for the SOCFPGA platform.
Signed-off-by: NDinh Nguyen <dinguyen@altera.com>

arch/arm/boot/dts/socfpga.dtsi

@@ -467,6 +467,8 @@
 			interrupts = <0 38 0x04>;
 			cache-unified;
 			cache-level = <2>;
+			arm,tag-latency = <1 1 1>;
+			arm,data-latency = <2 1 1>;
 		};
 
 		/* Local timer */