mtd: nand: raw: rockchip_nfc: use dev_read_addr_ptr

The fdt_addr_t and phys_addr_t size have been decoupled.
A 32bit CPU can expext 64-bit data from the device tree parser,
so use dev_read_addr_ptr in the rockchip_nfc.c file.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
diff --git a/drivers/mtd/nand/raw/rockchip_nfc.c b/drivers/mtd/nand/raw/rockchip_nfc.c
index d016d25..9f424a2 100644
--- a/drivers/mtd/nand/raw/rockchip_nfc.c
+++ b/drivers/mtd/nand/raw/rockchip_nfc.c
@@ -1180,9 +1180,9 @@
 	nfc->cfg = (void *)dev_get_driver_data(dev);
 	nfc->dev = dev;
 
-	nfc->regs = (void *)dev_read_addr(dev);
-	if (IS_ERR(nfc->regs)) {
-		ret = PTR_ERR(nfc->regs);
+	nfc->regs = dev_read_addr_ptr(dev);
+	if (!nfc->regs) {
+		ret = -EINVAL;
 		goto release_nfc;
 	}