dt/bindings: fsl/guts: Added global-utilities compatibles

v3 - Addressed Scott's feedback:
	Added "fsl,<chip>-guts"

v2 - Addressed Scott's feedback
Signed-off-by: Igal Liberman <Igal.Liberman@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

Documentation/devicetree/bindings/powerpc/fsl/guts.txt

@@ -9,6 +9,11 @@ Required properties:
 
  - compatible : Should define the compatible device type for
    global-utilities.
+   Possible compatibles:
+	"fsl,qoriq-device-config-1.0"
+	"fsl,qoriq-device-config-2.0"
+	"fsl,<chip>-device-config"
+	"fsl,<chip>-guts"
  - reg : Offset and length of the register set for the device.
 
 Recommended properties: