[nrf fromtree] boards: nrf54l15pdk_nrf54l15_cpuapp: add temp status okay

Set status = "okay" for temp device tree node to allow use
of nRF 802.15.4 Radio Driver on the nrf54l15pdk_nrf54l15_cpuapp board.

Signed-off-by: Andrzej Kuroś <andrzej.kuros@nordicsemi.no>
(cherry picked from commit 306d6c2)

boards/arm/nrf54l15pdk_nrf54l15/nrf54l15pdk_nrf54l15_cpuapp.dts

@@ -133,6 +133,10 @@
 	status = "okay";
 };
 
+&temp {
+	status = "okay";
+};
+
 &rram0 {
 	partitions {
 		compatible = "fixed-partitions";