ARM: orion5x: rename XOR node to dma-controller@<address>

This commit renames the XOR engine Device Tree node to
dma-controller@, to conform with the standard node name proposed by
the ePAPR.
Suggested-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: NSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: https://lkml.kernel.org/r/1398202002-28530-19-git-send-email-thomas.petazzoni@free-electrons.comSigned-off-by: NJason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/orion5x.dtsi

@@ -98,7 +98,7 @@
 				status = "disabled";
 			};
 
-			xor: xor@60900 {
+			xor: dma-controller@60900 {
 				compatible = "marvell,orion-xor";
 				reg = <0x60900 0x100
 				       0x60b00 0x100>;