power: fg-alg: Use batt_soc centi-percentage for CL calculations

The CL calculations currently use a 0-255 value of battery-SOC.
This adds to some inaccuracy in the learned capacity. Fix this
by using the centi-percentage value of battery SOC.

Change-Id: I9b07e5fb32f4bfc814337224bf41d44043603744
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>