elf.h (ASM_SPEC): Remove no-density option.

	* config/xtensa/elf.h (ASM_SPEC): Remove no-density option.  Reformat.
	* config/xtensa/linux.h (ASM_SPEC): Likewise.
	* config/xtensa/xtensa.h (TARGET_SWITCHES): Remove -mbig-endian,
	-mlittle-endian, -m[no-]density, -m[no-]abs, -m[no-]addx, -m[no-]mac16,
	-m[no-]mul16, -m[no-]mul32, -m[no-]nsa, -m[no-]minmax, -m[no-]sext,
	-m[no-]booleans, -mhard-float, -msoft-float, -m[no-]hard-float-div,
	-m[no-]hard-float-recip, -m[no-]hard-float-sqrt, and
	-m[no-]hard-float-rsqrt options.  Delete corresponding MASK_* macros
	and redefine corresponding TARGET_* macros with constants from the
	xtensa-config.h header.
	* doc/invoke.texi (Option Summary, Xtensa Options): Remove documention
	for the options listed above.

From-SVN: r71339