ARM: dts: imx53-voipac-dmm-668: Fix memory node duplication

BugLink: https://bugs.launchpad.net/bugs/1855313

[ Upstream commit 998a84c2 ]

imx53-voipac-dmm-668 has two memory nodes, but the correct representation
would be to use a single one with two reg entries - one for each RAM chip
select, so fix it accordingly.
Reported-by: Marco Franchi <marco.franchi@nxp.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Marco Franchi <marco.franchi@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

arch/arm/boot/dts/imx53-voipac-dmm-668.dtsi

@@ -17,12 +17,8 @@ / {
 
 	memory@70000000 {
 		device_type = "memory";
-		reg = <0x70000000 0x20000000>;
-	};
-
-	memory@b0000000 {
-		device_type = "memory";
-		reg = <0xb0000000 0x20000000>;
+		reg = <0x70000000 0x20000000>,
+		      <0xb0000000 0x20000000>;
 	};
 
 	regulators {