U-boot for Raspberry pi compute module 3 ,How to enable the console access through mini Uart Gpio 32 tx and 33 rx

Question

I am buliding u-boot for raspberry pi computemodule 3 ,i am using gcc-linaro-7.5.0-2019.12-x86_64_arm-linux-gnueabihf as cross tool chain , git clone https://gitlab.denx.de/