boards: arm: stm32g071 add rtc feature on the nucleo board

This patch enables the rtc so that the testcase
tests/drivers/counter/counter_basic_api
can run on this nucleo_g071rb board
also when running sanity check

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

boards/arm/nucleo_g071rb/doc/index.rst

@@ -100,6 +100,8 @@ The Zephyr nucleo_g071rb board configuration supports the following hardware fea
 +-----------+------------+-------------------------------------+
 | CLOCK     | on-chip    | reset and clock control             |
 +-----------+------------+-------------------------------------+
+| COUNTER   | on-chip    | rtc                                 |
++-----------+------------+-------------------------------------+
 | WATCHDOG  | on-chip    | independent watchdog                |
 +-----------+------------+-------------------------------------+
 | PWM       | on-chip    | pwm                                 |

boards/arm/nucleo_g071rb/nucleo_g071rb.dts

@@ -49,6 +49,10 @@
 	status = "okay";
 };
 
+&rtc {
+	status = "okay";
+};
+
 &iwdg {
 	status = "okay";
 };

boards/arm/nucleo_g071rb/nucleo_g071rb.yaml

@@ -16,6 +16,7 @@ supported:
   - gpio
   - i2c
   - spi
+  - counter
   - watchdog
   - pwm
   - dac