PROP_CURRENT_NOW value is first divided then multiplied up
causing a lose of accuracy. Use the same method as
PROP_CURRENT_AVG to do the calculation.
Signed-off-by: Philip Rakity <prakity@marvell.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>