def.h: add battery scale for flexbot nano

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
HACK: log battery voltage ADC reading as debug[1]

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
EEPROM: add flexbot default modes

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
EEPROM: only activate baro mode in aux2 mode

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Protocol.cpp: save a few bytes

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>