Patch for i386.md to fix DI move inconsistencies.

[Jeffrey A Law]

  In message <199804231930.PAA05710@jwlab.FEITH.COM>you write:
  > This patch changes the DI move patterns so that they respect
  > TARGET_MOVE and TARGET_PUSH_MEMORY.  These changes seem to
  > be worth about 1% speed increase on the crafty chess benchmark.
  > 
  > ChangeLog:
  > 
  > Thu Apr 23 14:37:18 EDT 1998  John Wehle  (john@feith.com)
  > 
  > 	* i386.md (movdi-1, movdi): Rewrite based on SI move patterns.
Thanks.  Installed.

jeff