i2c: Convert to using %pOF instead of full_name

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-sun6i-p2wi.c b/drivers/i2c/busses/i2c-sun6i-p2wi.c
index 7668e2e..8a24464 100644
--- a/drivers/i2c/busses/i2c-sun6i-p2wi.c
+++ b/drivers/i2c/busses/i2c-sun6i-p2wi.c
@@ -223,8 +223,8 @@ static int p2wi_probe(struct platform_device *pdev)
 	if (childnp) {
 		ret = of_property_read_u32(childnp, "reg", &slave_addr);
 		if (ret) {
-			dev_err(dev, "invalid slave address on node %s\n",
-				childnp->full_name);
+			dev_err(dev, "invalid slave address on node %pOF\n",
+				childnp);
 			return -EINVAL;
 		}