rf_uhd: fix rx timeout error after late with B210

it fixes #1623.

this happens more often with MIMO since lates are more likely here.

after a late, the Rx stream must not be stopped on the B2xx either.

<log>
RF status: O=3, U=0, L=1
/home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1209: Error timed out while receiving samples from UHD.

stop rx stream
./home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1209: Error timed out while receiving samples from UHD.

stop rx stream
/home/anpu/src/srsLTE/lib/src/phy/ue/ue_sync.c.775: Error receiving samples

/home/anpu/src/srsLTE/lib/src/phy/ue/ue_cell_search.c.312: Error calling srslte_ue_sync_work()

/home/anpu/src/srsLTE/lib/src/phy/ue/ue_cell_search.c.272: Error searching cell
</log>

lib/src/phy/rf/rf_uhd_imp.cc

@@ -72,7 +72,7 @@ const std::set<std::string> RH_UHD_IMP_FIX_MASTER_CLOCK_RATE_DEVICE_LIST = {"x30
 /**
  * List of devices that do NOT support stream stop/start after a time out
  */
-const std::set<std::string> RH_UHD_IMP_PROHIBITED_STOP_START = {DEVNAME_X300, DEVNAME_N300, DEVNAME_E3X0};
+const std::set<std::string> RH_UHD_IMP_PROHIBITED_STOP_START = {DEVNAME_X300, DEVNAME_N300, DEVNAME_E3X0, DEVNAME_B200};
 
 /**
  * Defines a delay used between the current USRP time and the start of the transmission. This value needs to be high