tests: subsys: ipc: ipc_latency: allow equal limit

Less strict limit - allow equal.

Signed-off-by: Piotr Kosycarz <piotr.kosycarz@nordicsemi.no>

Author: nordic-piks

tests/subsys/ipc/ipc_latency/src/main.c

@@ -199,7 +199,7 @@ static void test_ipc_latency(struct ipc_ept *endpoint, size_t test_message_len)
 		 average_timer_value_us);
 	TC_PRINT("Maximal allowed ping-pong time for %u bytes [us]: %llu\n", test_message_len,
 		 maximal_allowed_ping_pong_time_us);
-	zexpect_true(average_timer_value_us < maximal_allowed_ping_pong_time_us,
+	zexpect_true(average_timer_value_us <= maximal_allowed_ping_pong_time_us,
 		     "Measured IPC ping-pong latency is over the specified limit\n");
 
 	k_free(test_data);