[POWERPC] 83xx: Fix typo in mpc837x compatible entries

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc8377_rdb.dts

@@ -12,7 +12,7 @@
 /dts-v1/;
 
 / {
-	compatible = "fsl,mpc8377erdb";
+	compatible = "fsl,mpc8377rdb";
 	#address-cells = <1>;
 	#size-cells = <1>;
 

arch/powerpc/boot/dts/mpc8378_rdb.dts

@@ -12,7 +12,7 @@
 /dts-v1/;
 
 / {
-	compatible = "fsl,mpc8378erdb";
+	compatible = "fsl,mpc8378rdb";
 	#address-cells = <1>;
 	#size-cells = <1>;
 

arch/powerpc/boot/dts/mpc8379_rdb.dts

@@ -12,7 +12,7 @@
 /dts-v1/;
 
 / {
-	compatible = "fsl,mpc8379erdb";
+	compatible = "fsl,mpc8379rdb";
 	#address-cells = <1>;
 	#size-cells = <1>;