ADS131M02 is Texas Instruments 2-channel, 24-Bit differential
input ADC which support wide range datarate.
Driver add support for adc read, channel configure, adc sampling
mode configuration and power management.
[1]. https://www.ti.com/lit/ds/symlink/ads131m02.pdf
Signed-off-by: Karthikeyan Krishnasamy <karthikeyan@linumiz.com>