dt: dt-extract-compatibles: Handle cfile arguments in generator function Move the handling of the cfile arguments to a separate generator function to avoid redundancy. Signed-off-by: NĂcolas F. R. A. Prado <nfraprado@collabora.com> Link: https://lore.kernel.org/r/20230828211424.2964562-2-nfraprado@collabora.com Signed-off-by: Rob Herring <robh@kernel.org>