ARM: dts: imx6qdl-mba6: Move rtc alias to common location

The rtc alias is identical for both mba6a and mba6b.
Signed-off-by: NAlexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-mba6.dtsi

@@ -17,6 +17,7 @@
 		mmc1 = &usdhc2;
 		/delete-property/ mmc2;
 		/delete-property/ mmc3;
+		rtc0 = &rtc0;
 	};
 
 	chosen {

arch/arm/boot/dts/imx6qdl-mba6a.dtsi

@@ -6,12 +6,6 @@
  * Author: Markus Niebel <Markus.Niebel@tq-group.com>
  */
 
-/ {
-	aliases {
-		rtc0 = &rtc0;
-	};
-};
-
 &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_enet>, <&pinctrl_enet_fix>;

arch/arm/boot/dts/imx6qdl-mba6b.dtsi

@@ -6,12 +6,6 @@
  * Author: Markus Niebel <Markus.Niebel@tq-group.com>
  */
 
-/ {
-	aliases {
-		rtc0 = &rtc0;
-	};
-};
-
 &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_enet>;