mwl_free_dma_mem
static void mwl_free_dma_mem(struct dma_area *);
mwl_free_dma_mem(&sc->sc_cmd_dma);
mwl_free_dma_mem(&ring->rxdesc_dma);
mwl_free_dma_mem(&bf->rxbuf_dma);
mwl_free_dma_mem(&ring->txdesc_dma);
mwl_free_dma_mem(&bf->txbuf_dma);