* elf32-m68hc11.c (m68hc11_relax_group): New to relax group of
instructions.
(m68hc11_direct_relax): New to define table of relaxable instructions.
(find_relaxable_insn): New, find a relaxable insn.
(compare_reloc): New to compare two relocs.
(m68hc11_elf_relax_section): New, relax text sections.
(m68hc11_elf_relax_delete_bytes): New, delete bytes and adjust branchs.
(elf32_m68hc11_check_relocs): New function for GC support.
(elf32_m68hc11_relocate_section): New function for GC support.
(bfd_elf32_bfd_relax_section): Define to support linker relaxation.
(elf_backend_check_relocs): Likewise.
(elf_backend_relocate_section): Likewise.