Need relicensing permission for files in ccan repo

[ti-kamlesh]

CC0 is not OSI recommended license.

Need relicensing permission for below files. Though it would be awesome to get permission for all the files as other people will also be having this issue. What is the right way to do it?

https://git.ozlabs.org/?p=ccan;a=blob;f=ccan/list/list.h;hb=HEAD

https://git.ozlabs.org/?p=ccan;a=blob;f=ccan/container_of/container_of.h;hb=HEAD

https://git.ozlabs.org/?p=ccan;a=blob;f=ccan/check_type/check_type.h;hb=HEAD

https://git.ozlabs.org/?p=ccan;a=blob;f=ccan/ilog/ilog.c;hb=HEAD

https://git.ozlabs.org/?p=ccan;a=blob;f=ccan/ilog/ilog.h;hb=HEAD

https://git.ozlabs.org/?p=ccan;a=blob;f=ccan/build_assert/build_assert.h;hb=HEAD

The repo We are trying to submit is trusted firmware arm (https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/34815)

It prefers
SPDX-License-Identifier: BSD-3-Clause
https://trustedfirmware-a.readthedocs.io/en/latest/license.html#license

Thanks in advance.