ARM: dt: tegra{20,30}.dtsi: Rename "mc" to "memory-controller"

Use a more plain english name.

Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
[swarren: remove redundant unit address from tegra30.dtsi change]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 2dcc09e..1947939 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -167,7 +167,7 @@
 		reg = <0x7000e400 0x400>;
 	};
 
-	mc {
+	memory-controller {
 		compatible = "nvidia,tegra30-mc";
 		reg = <0x7000f000 0x010
 		       0x7000f03c 0x1b4