boards: heltec_wifi_lora32_v2: enable trng0

trng0 refers to the entropy source in the ESP32, as defined in
esp32.dtsi. It enables the configuration item ENTROPY_ESP32_RNG and
therefore offers an entropy driver, making the use of
CONFIG_TEST_RANDOM_GENERATOR unnecessary.

This change helps running the esp32_wifi_station sample.

Signed-off-by: Michael Laß <[email protected]>

Author: michaellass

boards/xtensa/heltec_wifi_lora32_v2/heltec_wifi_lora32_v2.dts

@@ -76,6 +76,10 @@
 	status = "okay";
 };
 
+&trng0 {
+	status = "okay";
+};
+
 &i2c0 {
 	status = "okay";
 	clock-frequency = <I2C_BITRATE_FAST>;