Fixed PinChangeInterrupt setup for ATtinyX4.
Fixed PinChangeInterrupt setup for ATtinyX4.

mikaelpatel/Cosa,rrobinet/Cosa,mikaelpatel/Cosa,kc9jud/Cosa,rrobinet/Cosa,rrobinet/Cosa,kc9jud/Cosa,dansut/Cosa,dansut/Cosa,kc9jud/Cosa,mikaelpatel/Cosa,dansut/Cosa,mikaelpatel/Cosa,jeditekunum/Cosa,jeditekunum/Cosa,jeditekunum/Cosa,dansut/Cosa,kc9jud/Cosa,jeditekunum/Cosa,rrobinet/Cosa