powerpc/85xx: Add MSI nodes for MPC8568/9 MDS systems

The MPC8568/9 chips support MSIs on PCIe so no reason not to enable them.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/mpc8568mds.dts

@@ -288,6 +288,22 @@ mpic: pic@40000 {
 			device_type = "open-pic";
 		};
 
+		msi@41600 {
+			compatible = "fsl,mpc8568-msi", "fsl,mpic-msi";
+			reg = <0x41600 0x80>;
+			msi-available-ranges = <0 0x100>;
+			interrupts = <
+				0xe0 0
+				0xe1 0
+				0xe2 0
+				0xe3 0
+				0xe4 0
+				0xe5 0
+				0xe6 0
+				0xe7 0>;
+			interrupt-parent = <&mpic>;
+		};
+
 		par_io@e0100 {
 			reg = <0xe0100 0x100>;
 			device_type = "par_io";

arch/powerpc/boot/dts/mpc8569mds.dts

@@ -252,6 +252,22 @@ mpic: pic@40000 {
 			device_type = "open-pic";
 		};
 
+		msi@41600 {
+			compatible = "fsl,mpc8568-msi", "fsl,mpic-msi";
+			reg = <0x41600 0x80>;
+			msi-available-ranges = <0 0x100>;
+			interrupts = <
+				0xe0 0
+				0xe1 0
+				0xe2 0
+				0xe3 0
+				0xe4 0
+				0xe5 0
+				0xe6 0
+				0xe7 0>;
+			interrupt-parent = <&mpic>;
+		};
+
 		global-utilities@e0000 {
 			compatible = "fsl,mpc8569-guts";
 			reg = <0xe0000 0x1000>;