NDFC_ST_CMD_FIFO_STATUS
sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
error = sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
error = sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);
sunxi_nand_wait_status(sc, NDFC_ST_CMD_FIFO_STATUS, 0);