If you're looking to the trendline facility on excel charts to do this, then I very much doubt if that will do it.
If you like, and if you know the autocorrelation coefficients, then it's not hard to transform data in Excel to make your data unautocorrelated, do the OLS regression on the transformed data and then chart it. Alternatively, use one of the many statistical programs around that have GLS procedures built in.
I don't see that autocorrelation is much of a problem for trendlines on charts, since even autocorrelated OLS still gives unbiased values for your coefficients, unless there are other problems too. Chart trendlines are only visual things so I very much doubt if it would look much different whether you allowed for the autocorrelation in charting or not.
It's only if you want to use the regression for more accurate purposes such as prediction ...