Revert "Add support to GNU ld to separate got related plt entries"

bfd/ChangeLog:

2019-03-01  Andreas Krebbel  <krebbel@linux.ibm.com>

	This reverts commit 5a12586d.
	2019-01-14  Maamoun Tarsha  <maamountk@hotmail.com>

	PR 20113
	* elf32-s390.c (allocate_dynrelocs): Update comment.

ld/ChangeLog:

2019-03-01  Andreas Krebbel  <krebbel@linux.ibm.com>

	This reverts commit 5a12586d.
	2019-01-14  Maamoun Tarsha  <maamountk@hotmail.com>

	PR 20113
	* emulparams/elf64_s390.sh (SEPARATE_GOTPLT): Define.
	* emulparams/elf_s390.sh (SEPARATE_GOTPLT): Define.
	* testsuite/ld-s390/gotreloc_31-1.dd: Update expected output.
	* testsuite/ld-s390/tlsbin.dd: Likewise.
	* testsuite/ld-s390/tlsbin.rd: Likewise.
	* testsuite/ld-s390/tlsbin.sd: Likewise.
	* testsuite/ld-s390/tlsbin_64.dd: Likewise.
	* testsuite/ld-s390/tlsbin_64.rd: Likewise.
	* testsuite/ld-s390/tlsbin_64.sd: Likewise.
	* testsuite/ld-s390/tlspic.dd: Likewise.
	* testsuite/ld-s390/tlspic.rd: Likewise.
	* testsuite/ld-s390/tlspic.sd: Likewise.
	* testsuite/ld-s390/tlspic_64.dd: Likewise.
	* testsuite/ld-s390/tlspic_64.rd: Likewise.
	* testsuite/ld-s390/tlspic_64.sd: Likewise.
	* testsuite/ld-s390/s390.exp: Skip s390 tests for tpf targets.