I am trying to change a Yocto build so that it uses ttymxc2 as the console instead of ttymxc0. I changed the environment variables so that the console is 'console=ttymxc2,115200n8'. When I boot the sd card, the u-boot messages are still output to ttymxc0 and then the kernel messages are output to ttymxc2. Where can I change the u-boot console so that its messages are also output to ttymxc2? Is this not changeable?