power: qpnp-fg: modify the cycle counter implementation

Currently, cycle counter gets incremented only when the charging
happens within the specified low and high soc thresholds. Instead
of that, implement the bucket based cycle counter algorithm which
increments the counters based on multiple charging buckets. This
helps to study the charging pattern.

For example, with a bucket count of 8, if the user charges from 5
to 30% and removes the charger, cycle counter for buckets 1 and 2
would get incremented. This bucket based cycle counters will be
available to the userspace via cycle_count property after the
cycle_count_id property is set to specify which bucket needs to
be read.

For example, to read cycle count for bucket 4, following helps.

echo 4 > /sys/class/power_supply/bms/cycle_count_id
cat /sys/class/power_supply/bms/cycle_count

Since this algorithm operates on all the SOC levels (0-100%),
there is no need for low and high SOC thresolds. Remove them.

CRs-Fixed: 847140
Change-Id: I1c0840f01693909586cafb3d51685637f3a6d2ba
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>