au1xxx_ddma_add_device
EXPORT_SYMBOL(au1xxx_ddma_add_device);
u32 au1xxx_ddma_add_device(dbdev_tab_t *dev);
memid = au1xxx_ddma_add_device(&au1xmmc_mem_dbdev);
ddma_memid = au1xxx_ddma_add_device(&au1550_spi_mem_dbdev);