dm: core: Replace of_offset with accessor (part 2)

At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 8bacd99..97e0bc0 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -860,7 +860,7 @@
 #ifdef CONFIG_PHY_FIXED
 	int sn;
 	const char *name;
-	sn = fdt_first_subnode(gd->fdt_blob, dev->of_offset);
+	sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
 	while (sn > 0) {
 		name = fdt_get_name(gd->fdt_blob, sn, NULL);
 		if (name != NULL && strcmp(name, "fixed-link") == 0) {
diff --git a/drivers/net/phy/ti.c b/drivers/net/phy/ti.c
index 1d87080..6ad31a0 100644
--- a/drivers/net/phy/ti.c
+++ b/drivers/net/phy/ti.c
@@ -174,7 +174,7 @@
 {
 	struct dp83867_private *dp83867 = phydev->priv;
 	struct udevice *dev = phydev->dev;
-	int node = dev->of_offset;
+	int node = dev_of_offset(dev);
 	const void *fdt = gd->fdt_blob;
 
 	if (fdtdec_get_bool(fdt, node, "ti,max-output-impedance"))
diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index d895d09..09bbb2c 100644
--- a/drivers/net/sun8i_emac.c
+++ b/drivers/net/sun8i_emac.c
@@ -820,7 +820,7 @@
 		parse_phy_pins(dev);
 
 #ifdef CONFIG_DM_GPIO
-	if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset,
+	if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
 			    "snps,reset-active-low"))
 		reset_flags |= GPIOD_ACTIVE_LOW;
 
@@ -828,7 +828,7 @@
 				   &priv->reset_gpio, reset_flags);
 
 	if (ret == 0) {
-		ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
+		ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
 					   "snps,reset-delays-us",
 					   sun8i_pdata->reset_delays, 3);
 	} else if (ret == -ENOENT) {