arm64: dts: rockchip: set to CCI clock of RK3399 to 600M

Per testing, this can reduce the memory latency and d8 gets
better scores.
Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -935,7 +935,7 @@ cru: clock-controller@ff760000 {
 			<&cru ACLK_PERIHP>, <&cru HCLK_PERIHP>,
 			<&cru PCLK_PERIHP>,
 			<&cru ACLK_PERILP0>, <&cru HCLK_PERILP0>,
-			<&cru PCLK_PERILP0>,
+			<&cru PCLK_PERILP0>, <&cru ACLK_CCI>,
 			<&cru HCLK_PERILP1>, <&cru PCLK_PERILP1>;
 		assigned-clock-rates =
 			 <594000000>,  <800000000>,
@@ -943,7 +943,7 @@ cru: clock-controller@ff760000 {
 			 <150000000>,   <75000000>,
 			  <37500000>,
 			 <100000000>,  <100000000>,
-			  <50000000>,
+			  <50000000>, <600000000>,
 			 <100000000>,   <50000000>;
 	};