[nrf fromtree] tests: boards: nrf: gppi: Add pdm0 node as test sink

Test is using one of the peripherals as sink for PPI events. So far
it supported LPCOMP or ECB on nrf54h20 cpurad. Some SoCs don't have
LPCOMP and another peripheral need to be used. Extended test to
use PDM in that case. nrf54h20 cpuapp configuration is changed to
use PDM instead of LPCOMP.

Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
(cherry picked from commit a4b69c5)

Author: nordic-krch

tests/boards/nrf/gppi/boards/nrf54h20dk_nrf54h20_cpuapp.overlay

@@ -16,6 +16,6 @@ dut_timer2: &timer134 {
 	status = "reserved";
 };
 
-&comp {
+&pdm0 {
 	status = "reserved";
 };

tests/boards/nrf/gppi/src/main.c

@@ -10,17 +10,46 @@
 #include <zephyr/ztest.h>
 #include <hal/nrf_timer.h>
 #include <hal/nrf_egu.h>
-#if defined(CONFIG_SOC_NRF54H20_CPURAD)
+#include <helpers/nrfx_gppi.h>
+#if DT_NODE_EXISTS(DT_NODELABEL(pdm0)) && DT_NODE_HAS_STATUS(DT_NODELABEL(pdm0), reserved)
+#include <hal/nrf_pdm.h>
+#elif DT_NODE_EXISTS(DT_NODELABEL(comp)) && DT_NODE_HAS_STATUS(DT_NODELABEL(comp), reserved)
+#include <hal/nrf_lpcomp.h>
+#elif defined(CONFIG_SOC_NRF54H20_CPURAD)
 #include <hal/nrf_ecb.h>
 #endif
-#include <hal/nrf_lpcomp.h>
-#include <helpers/nrfx_gppi.h>
 
 NRF_TIMER_Type *timer0 = (NRF_TIMER_Type *)DT_REG_ADDR(DT_NODELABEL(dut_timer0));
 NRF_TIMER_Type *timer1 = (NRF_TIMER_Type *)DT_REG_ADDR(DT_NODELABEL(dut_timer1));
 NRF_TIMER_Type *timer2 = (NRF_TIMER_Type *)DT_REG_ADDR(DT_NODELABEL(dut_timer2));
 
-#if DT_NODE_EXISTS(DT_NODELABEL(comp)) && DT_NODE_HAS_STATUS(DT_NODELABEL(comp), reserved)
+#if DT_NODE_EXISTS(DT_NODELABEL(pdm0)) && DT_NODE_HAS_STATUS(DT_NODELABEL(pdm0), reserved)
+NRF_PDM_Type *pdm = (NRF_PDM_Type *)DT_REG_ADDR(DT_NODELABEL(pdm0));
+
+static void sink_setup(void)
+{
+	nrf_pdm_task_trigger(pdm, NRF_PDM_TASK_STOP);
+	nrf_pdm_event_clear(pdm, NRF_PDM_EVENT_STARTED);
+	nrf_pdm_enable(pdm);
+}
+
+static void sink_cleanup(void)
+{
+	nrf_pdm_task_trigger(pdm, NRF_PDM_TASK_STOP);
+	nrf_pdm_disable(pdm);
+}
+
+static bool sink_evt_check(void)
+{
+	return nrf_pdm_event_check(pdm, NRF_PDM_EVENT_STARTED);
+}
+
+static uint32_t sink_tsk_addr(void)
+{
+	return nrf_pdm_task_address_get(pdm, NRF_PDM_TASK_START);
+}
+
+#elif DT_NODE_EXISTS(DT_NODELABEL(comp)) && DT_NODE_HAS_STATUS(DT_NODELABEL(comp), reserved)
 NRF_LPCOMP_Type *lpcomp = (NRF_LPCOMP_Type *)DT_REG_ADDR(DT_NODELABEL(comp));
 
 static void sink_setup(void)