* elf32-ppc.c (ppc_elf_check_relocs): Set pointer_equality_needed

	* elf32-ppc.c (ppc_elf_check_relocs): Set pointer_equality_needed
	for R_PPC_REL32 syms.  Don't set non_got_ref on branch reloc syms,
	and assume branch relocs are not dynamic when non-shared.
	(readonly_dynrelocs): New function, split out from..
	(maybe_set_textrel): ..here, renamed from old readonly_dynrelocs.
	(ppc_elf_adjust_dynamic_symbol): For symbols generating plt entries,
	clear non_got_ref..
	(allocate_dynrelocs): ..and don't set u.def for undefined weak.
	Do allow dynamic relocs on undefined symbols.
	(ppc_elf_adjust_dynamic_symbol): Use readonly_dynrelocs.
	(ppc_elf_relocate_section): Mirror dynamic reloc changes in
	check_relocs.
	(ppc_elf_finish_dynamic_symbol): Don't give a warning on weak
	plt symbols needing pointer_equality_needed.