Update pin_defs.h

Added __AVR_ATmega328__ to the list of supported targets

optiboot/bootloaders/optiboot/pin_defs.h

@@ -12,7 +12,7 @@
  */
 
 /*------------------------------------------------------------------------ */
-#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega88) || defined(__AVR_ATmega8__) || defined(__AVR_ATmega88__)
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega168P__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega88) || defined(__AVR_ATmega8__) || defined(__AVR_ATmega88__)
 /*------------------------------------------------------------------------ */
 
 /* Onboard LED is connected to pin PB5 in Arduino NG, Diecimila, and Duemilanove