S/390: Register pass_s390_early_mach statically

S/390: Register pass_s390_early_mach statically

The dump file used to come at the end of the sorted dump file list,
because the pass was registered dynamically. This did not reflect the
order in which passes are executed. Static registration fixes this:

* foo4.c.277r.split2
* foo4.c.281r.early_mach
* foo4.c.282r.pro_and_epilogue

gcc/ChangeLog:

2018-09-06  Ilya Leoshkevich  <iii@linux.ibm.com>

	PR target/80080
	* config/s390/s390-passes.def: New file.
	* config/s390/s390-protos.h (class rtl_opt_pass): Add forward
	declaration.
	(make_pass_s390_early_mach): Add declaration.
	* config/s390/s390.c (make_pass_s390_early_mach):
	(s390_option_override): Remove dynamic registration.
	* config/s390/t-s390: Add s390-passes.def.

From-SVN: r264142