ALSA: atmel: Remove leftovers of AVR32 removal

The ALSA related include header files are left overs after the commit

	020c526 ("ALSA: atmel: Remove AVR32 bits from the driver")

Fixes: 020c526 ("ALSA: atmel: Remove AVR32 bits from the driver")
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>

Author: andy-shev