ppro.md: Rewrite as a DFA pipeline description.

ppro.md: Rewrite as a DFA pipeline description.

	* ppro.md: Rewrite as a DFA pipeline description.
	* i386.md: Remove all uses of the ppro_uops attribute.
	* i386.c: (ix86_safe_ppro_uops, ix86_dump_ppro_packet,
	ix86_reorder_insn, ix86_sched_reorder_ppro, ix86_sched_init,
	ix86_sched_reorder, ix86_variable_issue,
	struct ix86_sched_data, TARGET_SCHED_VARIABLE_ISSUE,
	TARGET_SCHED_INIT, TARGET_SCHED_REORDER): Remove.
	(ia32_use_dfa_pipeline_interface): Add TARGET_PENTIUMPRO.
	(ia32_multipass_dfa_lookahead): Add TARGET_PENTIUMPRO.
	* athlon.md (athlon_ssecmp_load): Fix comment

From-SVN: r78933