SPRINGFIELD — A federal appeals panel upheld a ruling that found a 2009 Illinois campaign finance law does not violate free speech.The 7th U.S. Circuit Court of Appeals ruled Thursday that different contribution limits for different types of donors are not a violation of the First Amendment.The conservative group Illinois Liberty PAC, along with donor Edgar Bachrach and Republican state Sen. Kyle McCarter, sued Attorney General Lisa M. Madigan and the State Board of Elections in 2012, arguing the different donation …