makefile: drop -q -q (much quiet) from avrdude flags

Annoying when trying to figure out if uploading
actually does something.

Marlin/Makefile

 else
 AVRDUDE_CONF = $(ARDUINO_INSTALL_DIR)/hardware/tools/avr/etc/avrdude.conf
 endif
-AVRDUDE_FLAGS = -q -q -D -C$(AVRDUDE_CONF) \
+AVRDUDE_FLAGS = -D -C$(AVRDUDE_CONF) \
 	-p$(MCU) -P$(AVRDUDE_PORT) -c$(AVRDUDE_PROGRAMMER) \
 	-b$(UPLOAD_RATE)