Fix compile error.

applications/lofar2/libraries/ddrctrl/src/vhdl/ddrctrl.vhd

@@ -309,6 +309,7 @@ BEGIN
     dvr_mosi                  => dvr_mosi,
     dvr_miso                  => dvr_miso,
     wr_sosi                   => wr_sosi,
+    wr_siso                   => c_dp_siso_rdy,
     wr_fifo_usedw             => wr_fifo_usedw,
     rd_fifo_usedw             => rd_fifo_usedw,
     ctlr_wr_flush_en          => ctlr_wr_flush_en,