Mikrobus UART3 not working on HummingBoard Edge

Hi,
I am using SolidRun HummingBoard Edge (i.MX6 Quad 2GB Ram). I am also facing the same issue with UART3 pins on the mikrobus and I am unable to find UART2 in the list of serial ports available when I execute the command "dmesg | grep tty". I am using Debian 9.9 on my board and the firmware is 4.9.150.