mtd: nand: mxs: fix PIO_WORDs in mxs_nand_read_buf()

There is only one pio_word in this DMA transaction so data field must be 1.

Signed-off-by: Luca Ellero <luca.ellero@brickedbrain.com>

drivers/mtd/nand/mxs_nand.c

@@ -453,7 +453,7 @@ static void mxs_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int length)
 	d->cmd.data =
 		MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
 		MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_DEC_SEM |
-		MXS_DMA_DESC_WAIT4END | (4 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
+		MXS_DMA_DESC_WAIT4END | (1 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
 
 	d->cmd.address = 0;