summit-dl2: wip

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
adcdriver wip

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
ads124x wip
çonfig
f
wip mario
wip mario 2
Write/read registers working
refactoring: s/adc/st/
Add mutex to state struct and control it in set_pga_gain
test conversion