motorola: ignore initial power state loading

No need to initially power-up the modem.

plugins/motorola/mm-broadband-modem-motorola.c

@@ -75,6 +75,8 @@ iface_modem_init (MMIfaceModem *iface)
     iface->load_equipment_identifier_finish = NULL;
 
     /* These devices just don't implement AT+CFUN */
+    iface->load_power_state = NULL;
+    iface->load_power_state_finish = NULL;
     iface->modem_power_up = NULL;
     iface->modem_power_up_finish = NULL;
     iface->modem_init_power_down = NULL;