RK3399 更改输出log波特率为115200

tangh

修改uboot处的波特率配置：u-boot\configsrk3399_defconfig   

1. CONFIG_SYS_EXTRA_OPTIONS="RKCHIP_RK3399,PRODUCT_MID,NORMAL_WORLD,SECOND_LEVEL_BOOTLOADER,BAUDRATE=115200"

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修改kernel处的波特率配置：
kernel\arch\arm64\boot\dts\rockchip\rk3399-nanopi4-common.dtsi

1. fiq_debugger: fiq-debugger {
   
2.                 compatible = "rockchip,fiq-debugger";
   
3.                 rockchip,serial-id = <2>;
   
4.                 rockchip,signal-irq = <182>;
   
5.                 rockchip,wake-irq = <0>;
   
6.                 rockchip,irq-mode-enable = <1>;  /* If enable uart uses irq instead of fiq */
   
7.                 rockchip,baudrate = <115200>;  /* Only 115200 and 1500000 */
   
8.                 pinctrl-names = "default";
   
9.                 pinctrl-0 = <&uart2c_xfer>;
   
10.         };

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