jesd204: jesd204_up_ilas_mem: Fix blocking assignment

In this particular case the behaviour is the same with non-blocking and
blocking assignments, but that could change if the code is modified in the
future. To avoid any potentially issue due to this consistently use
non-blocking assignments.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

library/jesd204/axi_jesd204_rx/jesd204_up_ilas_mem.v

@@ -83,7 +83,7 @@ endgenerate
 
 always @(posedge core_clk) begin
   if (core_reset == 1'b1) begin
-    core_ilas_captured = 1'b0;
+    core_ilas_captured <= 1'b0;
   end else begin
     if (core_ilas_config_valid == 1'b1 && core_ilas_config_addr == 'h3) begin
       core_ilas_captured <= 1'b1;