avr.c (avr_mcu_types): Add support for attiny261...

	* config/avr/avr.c (avr_mcu_types): Add support for attiny261,
	attiny461, attiny861, attiny25, attiny45, attiny85, attiny24,
	attiny44, attiny84, at90pwm2, at90pwm3, atmega165p, atmega169p, 
	atmega164p, atmega324p, atmega644p, atmega644, atmega329, 
	atmega3290, atmega649, atmega6490, atmega406, atmega640, 
	atmega1280, atmega1281, at90can32, at90can64, at90usb646, 
	at90usb647, at90usb1286 and at90usb1287 devices.  
	* config/avr/avr.h (LINK_SPEC, CRT_BINUTILS_SPECS): (Ditto.).
	* config/avr/t-avr (MULTILIB_MATCHES): (Ditto.).

From-SVN: r113982