* config/tc-xtensa.c: Remove XTENSA_SECTION_RENAME ifdefs.

	* config/tc-xtensa.c: Remove XTENSA_SECTION_RENAME ifdefs.
	(add_section_rename): Delete.  Inlined into...
	(build_section_rename): ...here.  Use xstrdup instead of strdup.
	(xtensa_section_rename): Drop "const" from argument and return types.
	(md_show_usage): Indent to match show_usage().
	* config/tc-xtensa.h: Remove XTENSA_SECTION_RENAME ifdefs.
	(tc_canonicalize_section_name): Define.
	(md_elf_section_rename): Remove unused macro.
	* doc/as.texinfo (Overview): Document Xtensa --rename-section option.
	* doc/c-xtensa.texi (Xtensa Options): Likewise.
	(Frame Directive): Delete.