i2c: mxc: Fix dev_err being called on a nonexistant variable

The udevice we are working with is called `bus` and not `dev`.
Signed-off-by: NSean Anderson <seanga2@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NHeiko Schocher <hs@denx.de>
Tested-by: NPatrick Delaunay <patrick.delaunay@st.com>

drivers/i2c/mxc_i2c.c

@@ -941,7 +941,8 @@ static int mxc_i2c_probe(struct udevice *bus)
 	 */
 	ret = fdt_stringlist_search(fdt, node, "pinctrl-names", "gpio");
 	if (ret < 0) {
-		debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
+		debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n",
+		      bus->seq, i2c_bus->base);
 	} else {
 		ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
 				"scl-gpios", 0, &i2c_bus->scl_gpio,
@@ -952,7 +953,9 @@ static int mxc_i2c_probe(struct udevice *bus)
 		if (!dm_gpio_is_valid(&i2c_bus->sda_gpio) ||
 		    !dm_gpio_is_valid(&i2c_bus->scl_gpio) ||
 		    ret || ret2) {
-			dev_err(dev, "i2c bus %d at %lu, fail to request scl/sda gpio\n", bus->seq, i2c_bus->base);
+			dev_err(bus,
+				"i2c bus %d at %lu, fail to request scl/sda gpio\n",
+				bus->seq, i2c_bus->base);
 			return -EINVAL;
 		}
 	}