patman: Allow for changelog use in first version of a series

When a patchset had a RFC series, a v1 might have a changelog of
changes done since the RFC. The patch changes the range checked for
changelog and allow it to start for version 1.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Simon Glass <sjg@chromium.org>
1 file changed