* elf32-m68k.c (elf_m68k_hash_entry): Define.

	* elf32-m68k.c (elf_m68k_hash_entry): Define.
	(elf_m68k_link_hash_traverse): Remove.
	(elf_m68k_link_hash_newfunc): Use struct bfd_hash_entry and
	elf_m68k_hash_entry instead of struct elf_m68k_link_hash_entry to
	reduce casting.
	(elf_m68k_check_relocs): Use elf_m68k_hash_entry instead of
	casting.
	(elf_m68k_size_dynamic_sections): Use elf_link_hash_traverse
	instead of elf_m68k_link_hash_traverse.
	(elf_m68k_discard_copies): Change first parameter to pointer to
	struct elf_link_hash_entry and use elf_m68k_hash_entry when struct
	elf_m68k_link_hash_entry is needed.