The only way to reduce the Adjustment to Income self employment tax deduction would be to lower your business income, which would lower your self employment taxes, which would decrease your self employment tax Adjustment to income. But lowering your business income probably would be counter-productive to gaining the full IRA contribution.
So that being said, you would need to increase your business income and this will increase your self employment tax deduction but your modified AGI would increase to allow for the full IRA deduction. The down side is your self employment taxes will increase so you may end up with a higher tax bill to gain the full IRA deduction.
Here is a link to Self Employed and Small Business resources in TurboTax
