By Alun John HONG KONG (Reuters) – The dollar held its recent gains in Asian trading on Wednesday as investors looked towards a key Federal Reserve policy meeting to see if it would reinforce growing market expectations for earlier and additional rate rises next year. The dollar index which measures the greenback against six major peers was at 96.557, having gained 0.5% so far this week in choppy trading. It is testing last week’s 96.954, which would be a two-week top. The dollar’s gains have been broad-based, though daily moves were muted ahead of the Fed decision. The euro last traded at $1….