ecp5: Add ECLKBRIDGECS blackbox

Signed-off-by: David Shah <[email protected]>

techlibs/ecp5/cells_bb.v

@@ -333,6 +333,13 @@ module ECLKSYNCB(
 );
 endmodule
 
+(* blackbox *)
+module ECLKBRIDGECS(
+	input CLK0, CLK1, SEL,
+	output ECSOUT
+);
+endmodule
+
 (* blackbox *)
 module DCCA(
 	input CLKI, CE,