power: supply: axp20x_battery: Fix fault handling for AXP717

[ Upstream commit 98380110bd48fbfd6a798ee11fffff893d36062c ]

Correct the fault handling for the AXP717 by changing the i2c write
from regmap_update_bits() to regmap_write_bits(). The update bits
function does not work properly on a RW1C register where we must
write a 1 back to an existing register to clear it.

Additionally, as part of this testing I confirmed the behavior of
errors reappearing, so remove comment about assumptions.

Fixes: 66257670 ("power: supply: axp20x_battery: add support for AXP717")
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20250131231455.153447-2-macroalpha82@gmail.com


Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>