Makefile: Use own avrdude implementation for flashing
Makefile: Use own avrdude implementation for flashing

Missing auto-detection of baudrate based on MODEL, so might
need to customize the oneself. But at least now we're testing

rraallvv/microflo,microflo/microflo,rraallvv/microflo,microflo/microflo,rraallvv/microflo,microflo/microflo,microflo/microflo,microflo/microflo,microflo/microflo,rraallvv/microflo