powerpc/fsl-booke: Update DCSR EPU device tree entries for existing SoCs

Identifies the epu as compatible with Chassis v1 Debug IP.

Signed-off-by: Stephen George <Stephen.George@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi b/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi
index 97f8c26..a91897f 100644
--- a/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/p5040si-post.dtsi
@@ -129,7 +129,7 @@
 	compatible = "fsl,dcsr", "simple-bus";
 
 	dcsr-epu@0 {
-		compatible = "fsl,dcsr-epu";
+		compatible = "fsl,p5040-dcsr-epu", "fsl,dcsr-epu";
 		interrupts = <52 2 0 0
 			      84 2 0 0
 			      85 2 0 0>;