wpi_dma_contig_free
fail: wpi_dma_contig_free(dma);
wpi_dma_contig_free(&sc->shared_dma);
wpi_dma_contig_free(&sc->fw_dma);
wpi_dma_contig_free(&ring->desc_dma);
wpi_dma_contig_free(&ring->desc_dma);
wpi_dma_contig_free(&ring->cmd_dma);
void wpi_dma_contig_free(struct wpi_dma_info *);