zephyr: Modernize K&R function prototypes
Review Request #3775 — Created Jan. 21, 2025 and submitted — Latest diff uploaded
This is a backport of 811f82db29dd, as GCC and/or Clang is warning how these are outdated and unsupported for C23.
Compiled with GCC 15 without
-Wold-style-prototype
warnings raised.