ARM: tegra: Add cooling cells to ACTMON device-tree node

The ACTMON module monitors activity of memory clients and decisions
about a minimum required memory frequency are made based on info from
ACTMON. Add cooling cells to ACTMON device-tree node in order to turn
it into a cooling device that will throttle memory freq on overheat.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra124.dtsi

@@ -283,7 +283,7 @@ flow-controller@60007000 {
 		reg = <0x0 0x60007000 0x0 0x1000>;
 	};
 
-	actmon@6000c800 {
+	actmon: actmon@6000c800 {
 		compatible = "nvidia,tegra124-actmon";
 		reg = <0x0 0x6000c800 0x0 0x400>;
 		interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
@@ -295,6 +295,7 @@ actmon@6000c800 {
 		operating-points-v2 = <&emc_bw_dfs_opp_table>;
 		interconnects = <&mc TEGRA124_MC_MPCORER &emc>;
 		interconnect-names = "cpu-read";
+		#cooling-cells = <2>;
 	};
 
 	gpio: gpio@6000d000 {

arch/arm/boot/dts/tegra30.dtsi

@@ -410,7 +410,7 @@ ahb: ahb@6000c000 {
 		reg = <0x6000c000 0x150>; /* AHB Arbitration + Gizmo Controller */
 	};
 
-	actmon@6000c800 {
+	actmon: actmon@6000c800 {
 		compatible = "nvidia,tegra30-actmon";
 		reg = <0x6000c800 0x400>;
 		interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
@@ -422,6 +422,7 @@ actmon@6000c800 {
 		operating-points-v2 = <&emc_bw_dfs_opp_table>;
 		interconnects = <&mc TEGRA30_MC_MPCORER &emc>;
 		interconnect-names = "cpu-read";
+		#cooling-cells = <2>;
 	};
 
 	gpio: gpio@6000d000 {