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 <[e-mail]>
Signed-off-by: Li Yang <[e-mail]>
Signed-off-by: Kumar Gala <[e-mail]>

arch/powerpc/boot/dts/mpc8536ds.dtsi

···
 			reg = <0x68>;
 			interrupts = <0 0x1 0 0>;
 		};
+		adt7461@4c {
+			compatible = "adi,adt7461";
+			reg = <0x4c>;
+		};
 	};
 
 	spi@7000 {

arch/powerpc/boot/dts/p1022ds.dtsi

···
 			compatible = "dallas,ds1339";
 			reg = <0x68>;
 		};
+		adt7461@4c {
+			compatible = "adi,adt7461";
+			reg = <0x4c>;
+		};
 	};
 
 	spi@7000 {

arch/powerpc/boot/dts/p2041rdb.dts

···
 				compatible = "pericom,pt7c4338";
 				reg = <0x68>;
 			};
+			adt7461@4c {
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
 		};
 
 		i2c@118100 {

arch/powerpc/boot/dts/p3041ds.dts

···
 				reg = <0x68>;
 				interrupts = <0x1 0x1 0 0>;
 			};
+			adt7461@4c {
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
 		};
 	};
 

arch/powerpc/boot/dts/p4080ds.dts

···
 				reg = <0x68>;
 				interrupts = <0x1 0x1 0 0>;
 			};
+			adt7461@4c {
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
 		};
 
 		usb0: usb@210000 {

arch/powerpc/boot/dts/p5020ds.dts

···
 				reg = <0x68>;
 				interrupts = <0x1 0x1 0 0>;
 			};
+			adt7461@4c {
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
 		};
 	};
 

arch/powerpc/boot/dts/p5040ds.dts

···
 				label = "NAND Writable User area";
 				reg = <0x1f000000 0x01000000>;
 			};
+			adt7461@4c {
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
 		};
 
 		board-control@3,0 {