proper card powerup handling

Now that the timers work as intended other voltages (that lead to
timeouts) may be used.

Change-Id: I6105ce7f827aaec8ac36b940766fe05d47145edb
diff --git a/ccid_host/cuart_fsm_test.c b/ccid_host/cuart_fsm_test.c
index 5b03bfe..38cad14 100644
--- a/ccid_host/cuart_fsm_test.c
+++ b/ccid_host/cuart_fsm_test.c
@@ -79,7 +79,7 @@
 
 	/* activate reset, then power up */
 	card_uart_ctrl(&g_cuart, CUART_CTL_RST, true);
-	card_uart_ctrl(&g_cuart, CUART_CTL_POWER, true);
+	card_uart_ctrl(&g_cuart, CUART_CTL_POWER_1V8, true);
 	osmo_fsm_inst_dispatch(fi, ISO7816_E_POWER_UP_IND, NULL);
 
 	/* activate clock */