power: supply: charger-manager: Slighly simplify code

Use 'sizeof(*var)' instead of the equivalent 'sizeof(data structure type)'
because it is less verbose.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
1 file changed