* powerpc.cc (Target_powerpc::do_plt_address_for_local,

	* powerpc.cc (Target_powerpc::do_plt_address_for_local,
	do_plt_address_for_global): New functions.
	(Output_data_got_powerpc::do_write): Don't segfault when linking
	statically.
	(Output_data_plt_powerpc::add_entry, add_ifunc_entry,
	add_local_ifunc_entry): Return true on adding entry..
	(Target_powerpc::make_plt_entry): ..use to avoid unnecessary
	glink->add_entry call.  Remove unused symtab param.  Adjust calls.
	(Target_powerpc::make_local_ifunc_plt_entry): Likewise.
	(Target_powerpc::make_iplt_section): Remove symtab param.  Don't
	set up symbols here.
	(Target_powerpc::do_finalize_sections): Instead set up __rela_iplt
	syms here.  Do so even when no .iplt.  Don't segfault when linking
	statically.
	(Output_data_glink::add_entry, find_entry): Rearrange params.  Add
	new variants without reloc param.
	(Glink_sym_ent::Glink_sym_ent): Likewise.
	(Target_powerpc::Scan::reloc_needs_plt_for_ifunc): Accept any
	reloc when refs will resolve to plt call stub.
	(Target_powerpc::Scan::local): Correct ifunc handling.  Allow
	R_PPC_PLTREL24 to resolve locally.
	(Target_powerpc::Scan::global): Correct ifunc handling.
	(Target_powerpc::Relocate::relocate): Correct local sym glink
	lookup.  Don't destroy "value" when we have a plt call stub,
	and when checking plt call validity.
	(Target_powerpc::do_dynsym_value): Simplify.