power: supply: max1720x: add charge full property

power: supply: max1720x: add charge full property

Charge full holds the calculated full capacity of the cell based on all
inputs from the ModelGauge m5 algorithm including empty compensation. A
new full-capacity value is calculated continuously as application
conditions change.

Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
Link: https://lore.kernel.org/r/20241203-max1720x-charge-full-prop-v1-1-b02776b43f17@liebherr.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>