s390.md: Remove the generic pipeline description.

s390.md: Remove the generic pipeline description.

	* config/s390/s390.md: Remove the generic pipeline description.
	* config/s390/2064.md: Make all insn reservations apply to
	the z900, g5 and g6.
	* config/s390/s390.c (s390_use_dfa_pipeline_interface): Remove.
	(TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE):
	Define to hook_int_void_1.
	(s390_adjust_cost): Cleanup.  Don't check address dependency here.
	(s390_first_cycle_multipass_dfa_lookahead):

Co-Authored-By: Ulrich Weigand <uweigand@de.ibm.com>
From-SVN: r83350