power: qpnp-fg: disable charging during battery profile loading

Currently, a battery profile is loaded when the profile integrity
bit is not present, a new battery is inserted, or battery voltage
is not in range across reboot. When the battery profile loading
happens after the device has booted up, the charger driver is
notified to disable battery charging.

However, in cases like offline mode charging, the device can boot
up again with charging enabled causing battery parameters to be
modified even before the charger driver can probe. This causes
a jump in state of charge (SOC) across reboot and causes the FG
to restart. To help with this scenario, make sure the charger
driver is ready, and charging is kept disabled before the battery
profile loading process start. Enable charging back when there is
no need to reload the battery profile, or the FG has restarted
and the first SOC estimate is done.

CRs-Fixed: 953448
Change-Id: I90b1c81ce502c0f6e96feab3b23cff61054422cb
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>