ihp-sg13g2: Insert missing neg polarity latch rule

Signed-off-by: Martin Povišer <[email protected]>

Author: povik

flow/platforms/ihp-sg13g2/cells_latch.v

@@ -6,3 +6,11 @@ module $_DLATCH_P_(input E, input D, output Q);
         );
 endmodule
 
+module $_DLATCH_N_(input E, input D, output Q);
+    sg13g2_dllrq_1 _TECHMAP_REPLACE_ (
+        .D(D),
+        .GATE_N(E),
+        .RESET_B(1'b1),
+        .Q(Q)
+        );
+endmodule