The compatibility strings may be present in deployed firmware, they
cannot be removed. For many OCTEON boards, the device tree is a
firmware-kernel ABI, it is not practical to unilaterally decide to
change the bindings on the kernel side as you don't control the
firmware.
Hi David
We are keeping backwards compatibility. The kernel has always ignored
this string, and will continue to always ignore this string. But since
it is being ignored, you may as well remove it in future versions of
the DTB.
Andrew