Well, did that; flagged the package as out-of-date and emailed its maintainer. One week has passed: no reply, no update.
So, back to the problem. flashrom-dev and flashrom-svn-new should be removed from AUR as duplicates and I suggest orphaning flashrom-svn.
I just tried to build flashrom-svn and it compiles fine so I see no reason why flag it out of date.