powerpc/86xx: Add I2C device mappings in DTS for SBC610

Mappings for temperature sensors (adt7461 and lm92) are missing from the
SBC610's DTS file.

Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/gef_sbc610.dts

@@ -152,6 +152,16 @@
 			interrupt-parent = <&mpic>;
 			dfsrr;
 
+			hwmon@48 {
+				compatible = "national,lm92";
+				reg = <0x48>;
+			};
+
+			hwmon@4c {
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
+
 			rtc@51 {
 				compatible = "epson,rx8581";
 				reg = <0x00000051>;