We have a custom design that is based largely on the ul6_evk. The hardware folks decided to move the boot device from SD2 (the EVK's boot device) to sd1. u-boot can no longer boot into the kernel as expected. I know I am going to have to change u-boots IOMUX pin settings to enable sd1 but for the life of me can't figure out where those changed need to occur. We are using Yocto to do the builds and as such I believe uboot source is at <basedir>/tmp/work/imx6ulevk-poky-linux-gnueabi/u-boot-imx/2015.04-r0/git.
Any help would be greatly appreciated.