[PATCH][AVR] Add new device: ATtiny48

[Nick Clifton]

Hi Eric,

> /gas:
> 2007-10-05  Eric B. Weddington  <eweddington@cso.atmel.com>
> 
> 	* config/tc-avr.c (mcu_types): Add new device: ATtiny48.
> 	* doc/c-avr.texi: Document new device.

Approved and applied.

Cheers
   Nick