cairnsmore: Increase maximum clock frequency to 210 Mhz

driver-cairnsmore.c

@@ -20,7 +20,7 @@
 
 #define CAIRNSMORE1_MINIMUM_CLOCK  50
 #define CAIRNSMORE1_DEFAULT_CLOCK  200
-#define CAIRNSMORE1_MAXIMUM_CLOCK  200
+#define CAIRNSMORE1_MAXIMUM_CLOCK  210
 
 struct device_api cairnsmore_api;