tests: drivers: dac loopback testcase for nucleo g071rb

Running the testcase dac loopback on the nucleo_g071rb
target board.
The ADC1 in0 on PA0 (pin A0), the DAC1 out1 on PA4 (pin A2)
must be connected on the HW.

Signed-off-by: Francois Ramu <francois.ramu@st.com>

Author: FRASTM

tests/drivers/dac/dac_loopback/src/test_dac.c

@@ -52,7 +52,8 @@
 
 #elif defined(CONFIG_BOARD_NUCLEO_F207ZG) || \
 	defined(CONFIG_BOARD_NUCLEO_F429ZI) || \
-	defined(CONFIG_BOARD_NUCLEO_F746ZG)
+	defined(CONFIG_BOARD_NUCLEO_F746ZG) || \
+	defined(CONFIG_BOARD_NUCLEO_G071RB)
 /*
  * DAC output on PA4
  * ADC input read from PA0

tests/drivers/dac/dac_loopback/testcase.yaml

@@ -9,4 +9,4 @@ tests:
     platform_allow: |
       frdm_k22f frdm_k64f nucleo_f207zg nucleo_l073rz nucleo_l152re twr_ke18f
       bl652_dvk bl653_dvk bl654_dvk bl5340_dvk_cpuapp stm32f3_disco stm32l562e_dk
-      nucleo_l552ze_q nucleo_f429zi nucleo_f746zg nucleo_wl55jc
+      nucleo_l552ze_q nucleo_f429zi nucleo_f746zg nucleo_g071rb nucleo_wl55jc