power: supply: ab8500_charger: Remove unneeded semicolon

Fixes coccicheck warning:

drivers/power/supply/ab8500_charger.c:1082:2-3: Unneeded semicolon
drivers/power/supply/ab8500_charger.c:792:2-3: Unneeded semicolon
drivers/power/supply/ab8500_charger.c:2430:2-3: Unneeded semicolon

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Ma Feng <mafeng.ma@huawei.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>