mtd: nand: sunxi: remove direct mtd->priv accesses

mtd->priv is no longer pointing to the struct nand_chip it is attached to.
Replace those accesses by mtd_to_nand() calls.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes: 4be4e03e ("mtd: nand: sunxi: add randomizer support")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/sunxi_nand.c

@@ -642,7 +642,7 @@ static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc)
 static void sunxi_nfc_randomizer_config(struct mtd_info *mtd,
 					int page, bool ecc)
 {
-	struct nand_chip *nand = mtd->priv;
+	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	u32 ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
 	u16 state;
@@ -658,7 +658,7 @@ static void sunxi_nfc_randomizer_config(struct mtd_info *mtd,
 
 static void sunxi_nfc_randomizer_enable(struct mtd_info *mtd)
 {
-	struct nand_chip *nand = mtd->priv;
+	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 
 	if (!(nand->options & NAND_NEED_SCRAMBLING))
@@ -670,7 +670,7 @@ static void sunxi_nfc_randomizer_enable(struct mtd_info *mtd)
 
 static void sunxi_nfc_randomizer_disable(struct mtd_info *mtd)
 {
-	struct nand_chip *nand = mtd->priv;
+	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 
 	if (!(nand->options & NAND_NEED_SCRAMBLING))