powerpc: add adt7461 thermal monitor support to applicable boards

Add thermal monitor support to following boards:
P1022DS, MPC8536DS, P2041RDB, P3041DS, P4080DS, P5020DS, P5040DS

Signed-off-by: Jia Hongtao <B38951@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/boot/dts/mpc8536ds.dtsi b/arch/powerpc/boot/dts/mpc8536ds.dtsi
index d304a2d..7c3dde8 100644
--- a/arch/powerpc/boot/dts/mpc8536ds.dtsi
+++ b/arch/powerpc/boot/dts/mpc8536ds.dtsi
@@ -132,6 +132,10 @@
 			reg = <0x68>;
 			interrupts = <0 0x1 0 0>;
 		};
+		adt7461@4c {
+			compatible = "adi,adt7461";
+			reg = <0x4c>;
+		};
 	};
 
 	spi@7000 {