* elf64-ppc.c (ppc64_elf_link_hash_table_create): Init tls_get_addr.

	* elf64-ppc.c (ppc64_elf_link_hash_table_create): Init tls_get_addr.
	(ppc64_elf_copy_indirect_symbol): Merge tls_mask too.
	(ppc64_elf_gc_sweep_hook): Simplify removal of dyn_relocs.
	(allocate_dynrelocs): Don't treat undefined and undefweak specially.
	(ppc_size_one_stub): Fix warning, and tighten plt entry check.
	(group_sections): Don't share a stub section if stubs are for a large
	section.  Adjust comment.
	(ppc64_elf_size_stubs): Roughly double the size left for stubs if
	!stubs_always_before_branch.
	(ppc64_elf_relocate_section): Initialize tlsld GOT entry once.  Don't
	treat undefined and undefweak specially when processing dyn relocs.