fabulous: improvements to the pass

Signed-off-by: gatecat <[email protected]>

techlibs/fabulous/io_map.v

@@ -0,0 +1,8 @@
+module \$__FABULOUS_IBUF (input PAD, output O);
+	IO_1_bidirectional_frame_config_pass _TECHMAP_REPLACE_ (.PAD(PAD), .O(O), .T(1'b1));
+endmodule
+
+module \$__FABULOUS_OBUF (output PAD, input I);
+	IO_1_bidirectional_frame_config_pass _TECHMAP_REPLACE_ (.PAD(PAD), .I(I), .T(1'b0));
+endmodule
+