avr: Add dfu-programmer for avr

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
avr: Fix dfu-programmer for 8051

Signed-off-by: Nikita 'webconn' Maslov <wkernelteam@gmail.com>
Merge pull request #54 from nekromant/dfu-avr

avr: Add dfu-programmer for avr