reset counters when valid goes low that indicates a bsn_source restart

Closes L2SDP-373

libraries/base/dp/src/vhdl/dp_sync_recover.vhd

@@ -111,6 +111,10 @@ BEGIN
         v.data_cnt := 0;
         v.out_sosi.eop := '1';
       END IF;
+    ELSE
+      v.out_sosi := c_reg_rst.out_sosi;
+      v.out_bsn  := c_reg_rst.out_bsn;
+      v.data_cnt := c_reg_rst.data_cnt;
     END IF;
  
     nxt_r <= v;