configs: dra74x_evm.conf: fix typo

: is not really nice for a name :)

Signed-off-by: Nishanth Menon <nm@ti.com>
powertool: algo: average: switch rail voltage to Volts

It is a little more easier to read in output when volts are displayed

Signed-off-by: Nishanth Menon <nm@ti.com>
powertool: capture: Add proper logic for data capture

NOTE: this logic is purely serialized. there are opportunities
to make things parallel within reason:
a) all i2c operations per bus has to be serialized - no option but to do
that since i2c bus is a single bus.
b) on multiple busses, you can run a thread per bus since they will not
collide with each other.
c) data processing for rails can be done in parallel while waiting for
delay.

Signed-off-by: Nishanth Menon <nm@ti.com>