arm64: rockchip: rk3368: dts: add the parameters of auto-freq in dts

Change-Id: I8b19961a8a93b1ceb4378b1100d3f4cc8a5a9baa
Signed-off-by: Xiao Feng <xf@rock-chips.com>

arch/arm64/boot/dts/rk3368.dtsi

@@ -1132,6 +1132,10 @@
 						1020           324000
 						720            240000
 						>;
+					high_load = <70>;
+					low_load = <60>;
+					auto_freq_interval = <20>; /* ms */
+					down_rate_delay = <500>;   /* ms */
 					channel = <2>;
 					status = "disabled";
 				};