powerpc: dts: turris1x.dts: Add channel labels for temperature sensor

Channel 0 of SA56004ED chip refers to internal SA56004ED chip sensor (chip
itself is located on the board) and channel 1 of SA56004ED chip refers to
external sensor which is connected to temperature diode of the P2020 CPU.

Fixes: 54c15ec3 ("powerpc: dts: Add DTS file for CZ.NIC Turris 1.x routers")
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220930123901.10251-1-pali@kernel.org

arch/powerpc/boot/dts/turris1x.dts

@@ -69,6 +69,20 @@ temperature-sensor@4c {
 				interrupt-parent = <&gpio>;
 				interrupts = <12 IRQ_TYPE_LEVEL_LOW>, /* GPIO12 - ALERT pin */
 					     <13 IRQ_TYPE_LEVEL_LOW>; /* GPIO13 - CRIT pin */
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				/* Local temperature sensor (SA56004ED internal) */
+				channel@0 {
+					reg = <0>;
+					label = "board";
+				};
+
+				/* Remote temperature sensor (D+/D- connected to P2020 CPU Temperature Diode) */
+				channel@1 {
+					reg = <1>;
+					label = "cpu";
+				};
 			};
 
 			/* DDR3 SPD/EEPROM */