* elf64-ppc.c (ppc64_elf_branch_reloc): Check .opd is in a regular

	* elf64-ppc.c (ppc64_elf_branch_reloc): Check .opd is in a regular
	object file.
	(struct sfpr_def_parms): Save some space.
	(sfpr_define): Here too.

	* elf64-ppc.c (compare_symbols): Put section syms first.
	(sym_exists_at): New function.
	(ppc64_elf_get_synthetic_symtab): Use relocs to find code entry
	points only for relocatable files.  Use .opd section contents
	otherwise.  Generally clean up the code.