* powerpc.cc (Powerpc_relobj::set_got2_shndx): Delete.

	* powerpc.cc (Powerpc_relobj::set_got2_shndx): Delete.
	(Powerpc_relobj::do_find_special_sections): Don't use set_got2_shndx.
	(Output_data_glink::add_entry,find_entry): Remove shndx param.
	(class Glink_sym_ent): Rename from struct Glink_sym_ent.  Remove
	all references to shndx_.  Handle special case for R_PPC_PLTREL24
	here.
	(class Glink_sym_ent_hash): Rename from struct Glink_sym_ent_hash.
	(Output_data_glink::do_write): Retrieve got2_shdnx from object.
	(Target_powerpc::make_plt_entry): Don't special case R_PPC_PLTREL24
	here.
	(Target_powerpc::Scan::global): Nor on make_plt_entry call.
	(Target_powerpc::Relocate::relocate): Nor on glink->find_entry call.