bnge_adjust_pow_two
bn->rx_agg_nr_pages = bnge_adjust_pow_two(agg_ring_size,
bn->rx_nr_pages = bnge_adjust_pow_two(ring_size, RX_DESC_CNT);
bn->tx_nr_pages = bnge_adjust_pow_two(ring_size, TX_DESC_CNT);
bn->cp_nr_pages = bnge_adjust_pow_two(ring_size, CP_DESC_CNT);
return bnge_adjust_pow_two(rx_rings - 1,