* mips-dis.c, z8k-dis.c: Converted to use interface defined in

	* mips-dis.c, z8k-dis.c:  Converted to use interface defined in
	../include/dis-asm.h.
	* m68k-dis.c:  New file (merge of ../binutils/m68k-pinsn.c
	and ../gdb/m68k-pinsn.c).
	* i386-dis.c:  New file (merge of ../binutils/i386-pinsn.c
	and ../gdb/i386-pinsn.c).
	* m68881-ext.c:  New file.  Moved definition of
	ext_format ext_format_68881 from ../gdb/m68k-tdep.c.
	* Makefile.in:  Adjust for new files.
	* i386-dis.c:  Patches from John Hassey (hassey@dg-rtp.dg.com).
	* m68k-dis.c:  Recognize '9' placement code, so (say) pflush
	can be dis-assembled.