Yes, you can cancel the DC offset from a digital microhphone with a biquad filter, either using a pre-defined processing block that supports biquad filters or with a custom miniDSP program.
I suggest choosing a processing block (not a custom miniDSP program) and then programming the first biquad coefficients with a HP-filter that cuts off the DC. You can calculate the coefficients with TIBQ http://www.ti.com/tool/COEFFICIENT-CALC
Make sure you choose 24-bit coefficients, create the filter as per your requirements in TIBQ, write down the coefficients (click the Coeff button to open the window showing the coefficient) and program the hex values to the ADC coefficient space for the BQ (for example Coeff #0 starts at B40P1R8).