Remove port and baud options

- Avrdude should already be capable to recognize the correct port on
  which the usbasp is connected
- Removing baudrate, instead using slock_sck on usbasp

src/Makefile

@@ -4,10 +4,8 @@ TARGET		= clockinator
 SRCS 		= $(TARGET).S
 CC     		= avr-gcc
 OBJCOPY    	= avr-objcopy
-PORT       	= /dev/tty.usbmodem101
-BAUD       	= 19200
 PROGRAMMER 	= usbasp
-AVRDUDE    	= avrdude -P $(PORT) -b $(BAUD)
+AVRDUDE    	= avrdude
 CFLAGS     	= -mmcu=$(MCU) -Wall -Os -DF_CPU=$(F_CPU)
 
 all: $(TARGET).hex
@@ -20,7 +18,7 @@ $(TARGET).hex: $(TARGET).elf
 
 # Flash to MCU
 install: $(TARGET).hex
-	$(AVRDUDE) -c $(PROGRAMMER) -p $(MCU) -U flash:w:$(TARGET).hex:i -v
+	$(AVRDUDE) -c $(PROGRAMMER) -p $(MCU) -U flash:w:$(TARGET).hex:i -vvvv -D
 
 clean:
 	rm -f *.elf *.hex