video: revert to outputting "real" data on the HDMI channels

From the logic simulation it looks like we ought to get valid data on
the HDMI channel outputs now, but do we?

fpga/video.sv

@@ -82,14 +82,9 @@ module video (
        end // else: !if(~rst_n)
 
    wire [7:0] hdmi_data[0:2];
-   //assign hdmi_data[2] = r;
-   //assign hdmi_data[1] = g;
-   //assign hdmi_data[0] = b;
-   //assign hdmi_data[2] = 8'b11110000;
-   //assign hdmi_data[1] = 8'b11001100;
-   assign hdmi_data[2] = 8'b10101010;
-   assign hdmi_data[1] = 8'b10101010;
-   assign hdmi_data[0] = 8'b10101010;
+   assign hdmi_data[2] = r;
+   assign hdmi_data[1] = g;
+   assign hdmi_data[0] = b;
 
    wire [1:0] hdmi_ctl[0:2];
    assign hdmi_ctl[0]      = { vsync, hsync };