gcc_update (gcc/config/avr/avr-tables.opt): New dependencies.

gcc_update (gcc/config/avr/avr-tables.opt): New dependencies.

contrib:
	* gcc_update (gcc/config/avr/avr-tables.opt): New dependencies.

gcc:
	* config/avr/avr-mcus.def, config/avr/genopt.sh: New files.
	* config/avr/avr-tables.opt: New file (generated).
	* config.gcc (avr-*-*): Use avr/avr-tables.opt.
	* config/avr/avr-devices.c (avr_mcu_types): Move contents to
	avr-mcus.def.
	* config/avr/avr.c (avr_help, TARGET_HELP): Remove.
	(avr_option_override): Don't process -mmcu= argument here.  Set
	avr_current_device using avr_mcu_index.
	(avr_file_start): Use avr_current_device->name instead of
	avr_mcu_name.
	* config/avr/avr.opt (mmcu=): Use Enum.
	* config/avr/t-avr (avr-devices.o): Update dependencies.
	($(srcdir)/config/avr/avr-tables.opt): New.
	* target.def (help): Remove.
	* doc/tm.texi.in (TARGET_HELP): Remove.
	* doc/tm.texi: Regenerate.
	* opts.c: Don't include target.h.
	(common_handle_option): Don't call targetm.help.
	* system.h (TARGET_HELP): Poison.
	* Makefile.in (opts.o): Update dependencies.

From-SVN: r175248