Revert "vendor.xilinx_7series: byte swap generated bitstream"

This reverts commit 14a5c42.

Author: whitequark

nmigen/vendor/xilinx_7series.py

@@ -143,8 +143,7 @@ def _part(self):
             report_timing_summary -datasheet -max_paths 10 -file {{name}}_timing.rpt
             report_power -file {{name}}_power.rpt
             {{get_override("script_before_bitstream")|default("# (script_before_bitstream placeholder)")}}
-            write_bitstream -force {{name}}.bit
-            write_cfgmem -force -format bin -interface smapx32 -disablebitswap -loadbit "up 0 {{name}}.bit" {{name}}.bin
+            write_bitstream -force -bin_file {{name}}.bit
             {{get_override("script_after_bitstream")|default("# (script_after_bitstream placeholder)")}}
             quit
         """,