Merge patch series "board/ti: k3 boards: Stop using findfdt"

Nishanth Menon <nm@ti.com> says:

This is a wide cleanup to switch to setting fdtfile using env_set
instead of scripted magic. 'fdtfile' is expected to be set by default.
This allows the stdboot triggered efi loaders to find the correct OS
device tree file even if regular boot process is interrupted by user
intervention.