frappy_psi/adq_mr (ultrasound): exit on reboot error message

otherwise the error message is confusing
+ remove CR from line endings in adq_mr.py

Change-Id: Ia465a26803a92677383969ff620ef35e58f1a5ec

frappy_psi/adq_mr.py

@@ -104,7 +104,8 @@ class Adq:
         if n_of_adq != 1:
             print('number of ADQs must be 1, not %d' % n_of_adq)
             print('it seems the ADQ was not properly closed')
-            raise RuntimeError('please try again or reboot')
+            print('please try again or reboot')
+            sys.exit(0)
         atexit.register(self.deletecu)
         signal.signal(signal.SIGTERM, lambda *_: sys.exit(0))