arm64: dts: set UART1 clock frequency to 150MHz

Enable support for higher baud rates (up to 3Mbps) in UART1 - required
for bluetooth transfers.
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Tested-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts

@@ -55,6 +55,8 @@ i2c1: i2c@f7101000 {
 		};
 
 		uart1: uart@f7111000 {
+			assigned-clocks = <&sys_ctrl HI6220_UART1_SRC>;
+			assigned-clock-rates = <150000000>;
 			status = "ok";
 		};