powerpc/5200: Use the gpt* labels to simplify mpc5200 dts files

The DTC labels feature allows a dts file to reference a node without
having to reproduce the entire node hierarchy above it. We can use this
to simplify the MPC5200 board dts files by referencing the gpt nodes by
label.

Cc: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
[agust: fixed gpt7 phandle in the csi node of o2d.dtsi]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/arch/powerpc/boot/dts/digsy_mtc.dts b/arch/powerpc/boot/dts/digsy_mtc.dts
index a7511f2..955bff6 100644
--- a/arch/powerpc/boot/dts/digsy_mtc.dts
+++ b/arch/powerpc/boot/dts/digsy_mtc.dts
@@ -13,6 +13,9 @@
 
 /include/ "mpc5200b.dtsi"
 
+&gpt0 { gpio-controller; fsl,has-wdt; };
+&gpt1 { gpio-controller; };
+
 / {
 	model = "intercontrol,digsy-mtc";
 	compatible = "intercontrol,digsy-mtc";
@@ -22,17 +25,6 @@
 	};
 
 	soc5200@f0000000 {
-		timer@600 {	// General Purpose Timer
-			#gpio-cells = <2>;
-			fsl,has-wdt;
-			gpio-controller;
-		};
-
-		timer@610 {
-			#gpio-cells = <2>;
-			gpio-controller;
-		};
-
 		rtc@800 {
 			status = "disabled";
 		};