ARM: dts: artpec: use optimized pl310 settings

Use the cache settings that were determined to give best performance
on artpec-6 typical workloads.

Signed-off-by: Lars Persson <larper@axis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/artpec6.dtsi

@@ -137,6 +137,13 @@
 		arm,data-latency = <1 1 1>;
 		arm,tag-latency = <1 1 1>;
 		arm,filter-ranges = <0x0 0x80000000>;
+		arm,double-linefill = <1>;
+		arm,double-linefill-incr = <0>;
+		arm,double-linefill-wrap = <0>;
+		prefetch-data = <1>;
+		prefetch-instr = <1>;
+		arm,prefetch-offset = <0>;
+		arm,prefetch-drop = <1>;
 	};
 
 	pmu {