QE: Add IC, SI and SIRAM document to device tree bindings.

Add IC, SI and SIRAM document of QE to
Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe.txt

Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Scott Wood <oss@buserror.net>

Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/qe.txt

@@ -69,6 +69,58 @@ Example:
 	};
      };
 
+* Interrupt Controller (IC)
+
+Required properties:
+- compatible : should be "fsl,qe-ic".
+- reg : Address range of IC register set.
+- interrupts : interrupts generated by the device.
+- interrupt-controller : this device is a interrupt controller.
+
+Example:
+
+	qeic: interrupt-controller@80 {
+		interrupt-controller;
+		compatible = "fsl,qe-ic";
+		#address-cells = <0>;
+		#interrupt-cells = <1>;
+		reg = <0x80 0x80>;
+		interrupts = <95 2 0 0  94 2 0 0>;
+	};
+
+* Serial Interface Block (SI)
+
+The SI manages the routing of eight TDM lines to the QE block serial drivers
+, the MCC and the UCCs, for receive and transmit.
+
+Required properties:
+- compatible : must be "fsl,<chip>-qe-si". For t1040, must contain
+  "fsl,t1040-qe-si".
+- reg : Address range of SI register set.
+
+Example:
+
+	si1: si@700 {
+		compatible = "fsl,t1040-qe-si";
+		reg = <0x700 0x80>;
+	};
+
+* Serial Interface Block RAM(SIRAM)
+
+store the routing entries of SI
+
+Required properties:
+- compatible : should be "fsl,<chip>-qe-siram". For t1040, must contain
+  "fsl,t1040-qe-siram".
+- reg : Address range of SI RAM.
+
+Example:
+
+	siram1: siram@1000 {
+		compatible = "fsl,t1040-qe-siram";
+		reg = <0x1000 0x800>;
+	};
+
 * QE Firmware Node
 
 This node defines a firmware binary that is embedded in the device tree, for