tests: Bluetooth: bsim: Use wait lower than advertising interval

Fix failure due to advertising report count being
incremented faster than the wait loop that had longer delay
compared to the received interval of the advertising report.

Fixes #37652.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

tests/bluetooth/bsim_bt/bsim_test_advx/src/main.c

@@ -26,7 +26,8 @@
 #define EVT_PROP_SCAN   BIT(1)
 #define EVT_PROP_ANON   BIT(5)
 #define EVT_PROP_TXP    BIT(6)
-#define ADV_INTERVAL    0x20
+#define ADV_INTERVAL    0x20   /* 20 ms advertising interval */
+#define ADV_WAIT_MS     10     /* 10 ms wait loop */
 #define OWN_ADDR_TYPE   1
 #define PEER_ADDR_TYPE  0
 #define PEER_ADDR       NULL
@@ -1340,7 +1341,7 @@ static void test_scanx_main(void)
 	printk("Waiting...");
 	while (!is_periodic ||
 	       (per_adv_evt_cnt_actual != per_adv_evt_cnt_expected)) {
-		k_sleep(K_MSEC(30));
+		k_sleep(K_MSEC(ADV_WAIT_MS));
 	}
 	printk("done.\n");