dtc has new checks for I2C buses. Fix the warnings in unit-addresses in
the unittests.
drivers/of/unittest-data/testcases.dtb: Warning (i2c_bus_reg): /testcase-data/overlay-node/test-bus/i2c-test-bus/test-unittest14/i2c@0/test-mux-dev: I2C bus unit address format error, expected "20"
drivers/of/unittest-data/overlay_15.dtb: Warning (i2c_bus_reg): /fragment@0/__overlay__/test-unittest15/i2c@0/test-mux-dev: I2C bus unit address format error, expected "20"
Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
                        #size-cells = <0>;
                        reg = <0>;
 
-                       test-mux-dev {
-                               reg = <32>;
+                       test-mux-dev@20 {
+                               reg = <0x20>;
                                compatible = "unittest-i2c-dev";
                                status = "okay";
                        };
 
                                                        #size-cells = <0>;
                                                        reg = <0>;
 
-                                                       test-mux-dev {
-                                                               reg = <32>;
+                                                       test-mux-dev@20 {
+                                                               reg = <0x20>;
                                                                compatible = "unittest-i2c-dev";
                                                                status = "okay";
                                                        };