ARM: dts: mmp2-brownstone: Don't redeclare phandle references

Extend the nodes by their phandle references instead of recreating the
tree and declaring references of the same names.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200320174107.29406-5-lkundrak@v3.skSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/boot/dts/mmp2-brownstone.dts

@@ -19,13 +19,13 @@ memory {
 		device_type = "memory";
 		reg = <0x00000000 0x08000000>;
 	};
+};
 
-	soc {
-		apb@d4000000 {
-			uart3: uart@d4018000 {
+&uart3 {
 	status = "okay";
-			};
-			twsi1: i2c@d4011000 {
+};
+
+&twsi1 {
 	status = "okay";
 	pmic: max8925@3c {
 		compatible = "maxium,max8925";
@@ -185,10 +185,8 @@ charger {
 			no-insert-detect = <0>;
 		};
 	};
-			};
-			rtc: rtc@d4010000 {
+};
+
+&rtc {
 	status = "okay";
-			};
-		};
-	};
 };