mtd: nand: make use of mtd_to_nand() in NAND drivers

mtd_to_nand() was recently introduced to avoid direct accesses to the
mtd->priv field. Update all NAND drivers to use it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c
index 277626e..fcd9fac 100644
--- a/drivers/mtd/nand/lpc32xx_slc.c
+++ b/drivers/mtd/nand/lpc32xx_slc.c
@@ -260,7 +260,7 @@
 	unsigned int ctrl)
 {
 	uint32_t tmp;
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 
 	/* Does CE state need to be changed? */
@@ -284,7 +284,7 @@
  */
 static int lpc32xx_nand_device_ready(struct mtd_info *mtd)
 {
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 	int rdy = 0;
 
@@ -339,7 +339,7 @@
  */
 static uint8_t lpc32xx_nand_read_byte(struct mtd_info *mtd)
 {
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 
 	return (uint8_t)readl(SLC_DATA(host->io_base));
@@ -350,7 +350,7 @@
  */
 static void lpc32xx_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
 {
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 
 	/* Direct device read with no ECC */
@@ -363,7 +363,7 @@
  */
 static void lpc32xx_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
 {
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 
 	/* Direct device write with no ECC */
@@ -428,7 +428,7 @@
 static int lpc32xx_xmit_dma(struct mtd_info *mtd, dma_addr_t dma,
 			    void *mem, int len, enum dma_transfer_direction dir)
 {
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 	struct dma_async_tx_descriptor *desc;
 	int flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
@@ -488,7 +488,7 @@
 static int lpc32xx_xfer(struct mtd_info *mtd, uint8_t *buf, int eccsubpages,
 			int read)
 {
-	struct nand_chip *chip = mtd->priv;
+	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct lpc32xx_nand_host *host = chip->priv;
 	int i, status = 0;
 	unsigned long timeout;