power: supply: bq27xxx: After charger plug in/out wait 0.5s for things to stabilize

stable inclusion
from stable-v5.10.182
commit 277b489ad0b70c2ffa6b6805e7f20b54399f8d50
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GJZJ

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=277b489ad0b70c2ffa6b6805e7f20b54399f8d50



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[ Upstream commit 59a99cd4 ]

bq27xxx_external_power_changed() gets called when the charger is plugged
in or out. Rather then immediately scheduling an update wait 0.5 seconds
for things to stabilize, so that e.g. the (dis)charge current is stable
when bq27xxx_battery_update() runs.

Fixes: 740b755a ("bq27x00: Poll battery state")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>