imageon: Zed, updated system_top to remove part of the Warnings.

- spi csn signals should be tied to 1 if spi is not used
- constraints fixed so Vivado doesn't issue a Warning

projects/imageon/zed/system_constr.xdc

@@ -50,7 +50,7 @@ set_property  -dict {PACKAGE_PIN   N20    IOSTANDARD LVCMOS25}    [get_ports  hd
 
 # clock definition
 
-create_clock -period 6.66667  -name hdmi_rx_clk  [get_ports hdmi_rx_clk]
+create_clock -period 6.667  -name hdmi_rx_clk  [get_ports hdmi_rx_clk]
 
 # i2s
 

projects/imageon/zed/system_top.v

@@ -156,6 +156,8 @@ module system_top (
   wire    [ 1:0]  iic_mux_sda_o_s;
   wire            iic_mux_sda_t_s;
 
+  assign gpio_i[63:34] = gpio_o[63:34];
+
   // instantiations
 
   ad_iobuf #(.DATA_WIDTH(2)) i_gpio (
@@ -252,7 +254,7 @@ module system_top (
     .spi0_csn_0_o (),
     .spi0_csn_1_o (),
     .spi0_csn_2_o (),
-    .spi0_csn_i (1'b0),
+    .spi0_csn_i (1'b1),
     .spi0_sdi_i (1'b0),
     .spi0_sdo_i (1'b0),
     .spi0_sdo_o (),
@@ -261,7 +263,7 @@ module system_top (
     .spi1_csn_0_o (),
     .spi1_csn_1_o (),
     .spi1_csn_2_o (),
-    .spi1_csn_i (1'b0),
+    .spi1_csn_i (1'b1),
     .spi1_sdi_i (1'b0),
     .spi1_sdo_i (1'b0),
     .spi1_sdo_o ());