Merge patch series "tools: fdtgrep: Mark util_version() as static"

This series from Ilias Apalodimas <ilias.apalodimas@linaro.org> lays
some of the groundwork for being able to enable the -Wmissing-prototypes
compiler flag while building U-Boot by fixing the obvious problems in
the tools directory.

Link: https://lore.kernel.org/r/20250829081628.2327372-1-ilias.apalodimas@linaro.org