* config/obj-ecoff.c (ecoff_frob_file_before_fix): Correct section

	* config/obj-ecoff.c (ecoff_frob_file_before_fix): Correct section
	list traversal.  Use bfd_section_list_prepend.
	* config/tc-mmix.c (mmix_frob_file): Don't needlessly iterate
	over the section list.
	* config/tc-xtensa.c (xtensa_remove_section): Delete.
	(xtensa_insert_section): Delete.
	(xtensa_move_seg_list_to_beginning): Use bfd_section_list_remove
	and bfd_section_list_prepend.
	(xtensa_reorder_seg_list): Use bfd_section_list_remove and
	bfd_section_list_insert_after.