ad_tdd_control: Delete redundant reset from tdd_burst_counter logic

This way we can slightly improve timing.

library/common/ad_tdd_control.v

@@ -230,16 +230,12 @@ module ad_tdd_control#(
 
   // tdd burst counter
   always @(posedge clk) begin
-    if (rst == 1'b1) begin
-        tdd_burst_counter <= 6'b0;
-    end else begin
     if (tdd_cstate == OFF) begin
       tdd_burst_counter <= tdd_burst_count;
     end else if ((tdd_burst_counter != 0) && (tdd_endof_frame == 1'b1)) begin
       tdd_burst_counter <= tdd_burst_counter - 1'b1;
     end
   end
-  end
 
   always @(posedge clk) begin
     tdd_last_burst <= (tdd_burst_counter == 6'b1) ? 1'b1 : 1'b0;