/lib/firmware/cxgb4/t4fw.bin is in linux-firmware 1.79.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/firmware/cxgb4/t4fw-1.4.16.0.bin
/lib/firmware/cxgb4/t4fw-1.4.16.0.bin