ARM: nomadik: set latencies to 8 cycles

The Nomadik has sporadic crashes because of these latencies, setting
them to max makes the platform work nicely, so use this values for
now.

These latencies were set to 2 since the Nomadik platform was merged,
but I suspect they never took effect until the right size and
associativity for the cache was specified in the device tree and
that is why the crash comes now.

Cc: stable@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/ste-nomadik-stn8815.dtsi

@@ -25,9 +25,9 @@
 		cache-sets = <512>;
 		cache-line-size = <32>;
 		/* At full speed latency must be >=2 */
-		arm,tag-latency = <2>;
-		arm,data-latency = <2 2>;
-		arm,dirty-latency = <2>;
+		arm,tag-latency = <8>;
+		arm,data-latency = <8 8>;
+		arm,dirty-latency = <8>;
 	};
 
 	mtu0: mtu@101e2000 {