pinctrl: imx: use devfdt_get_addr_size_index

fdtdec_get_addr_size could not parse addr/size correctly is
using address-cells 2 and size-cells 2 on an ARM32 SoC.
So switch to use devfdt_get_addr_size_index.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/pinctrl/nxp/pinctrl-imx.c b/drivers/pinctrl/nxp/pinctrl-imx.c
index 0c9d15c..69c4144 100644
--- a/drivers/pinctrl/nxp/pinctrl-imx.c
+++ b/drivers/pinctrl/nxp/pinctrl-imx.c
@@ -214,9 +214,7 @@
 	if (info->flags & IMX8_USE_SCU)
 		return 0;
 
-	addr = fdtdec_get_addr_size(gd->fdt_blob, dev_of_offset(dev), "reg",
-				    &size);
-
+	addr = devfdt_get_addr_size_index(dev, 0, &size);
 	if (addr == FDT_ADDR_T_NONE)
 		return -EINVAL;