* config/avr/avr.c (avr_base_arch_macro, avr_extra_arch_macro): New.
	(avr_asm_only_p): Make non-static.
	(enum avr_arch): Remove.
	(avr_arch_types): New.
	(avr_mcu_types): Update.
	(avr_override_options): Use avr_arch_types table instead of switch.
	* avr.h (CPP_PREDEFINES): Die.
	(avr_base_arch_macro, avr_extra_arch_macro): New.
	(TARGET_CPU_CPP_BUILTINS): New.
	(CPP_SPEC, EXTRA_SPECS): Simplify.
	(CPP_AVR1_SPEC, CPP_AVR2_SPEC, CPP_AVR3_SPEC, CPP_AVR4_SPEC,
	CPP_AVR5_SPEC): Die.

Co-Authored-By: Marek Michalkiewicz <marekm@amelek.gda.pl>

From-SVN: r54023