Remove IA64 speculation tweaking flags

Remove IA64 speculation tweaking flags

	* config/ia64/ia64.c (ia64_set_sched_flags): Delete handling of
	speculation tuning flags.
	(msched-prefer-non-data-spec-insns,)
	(msched-prefer-non-control-spec-insns): Obsolete options.
	* haifa-sched.c (choose_ready): Remove handling of
	PREFER_NON_CONTROL_SPEC and PREFER_NON_DATA_SPEC.
	* sched-int.h (enum SPEC_SCHED_FLAGS): Remove PREFER_NON_CONTROL_SPEC
	and PREFER_NON_DATA_SPEC.
	* sel-sched.c (process_spec_exprs): Remove handling of
	PREFER_NON_CONTROL_SPEC and PREFER_NON_DATA_SPEC.

From-SVN: r210746