* elf32-ppc.c (struct plt_entry): Revise comments.

	* elf32-ppc.c (struct plt_entry): Revise comments.
	(ppc_elf_check_relocs): Don't create needless plt_entry info
	for non-pie executables.  Don't test info->pie when info->shared
	already covers that case.
	(ppc_elf_gc_sweep_hook): Adjust for above change.
	(add_stub_sym): Don't test info->pie when info->shared tested.
	(allocate_dynrelocs, ppc_elf_size_dynamic_sections): Likewise.
	(write_glink_stub, ppc_elf_finish_dynamic_symbol): Likewise.
	(ppc_elf_relax_section): Adjust find_plt_ent arguments.
	(ppc_elf_relocate_section): Likewise.