leds: leds-pm8xxx: disable boost when wled is off

Disable wled backlight boost when brightness level is
set to 0 to save power.

CRs-fixed: 360590
Change-Id: Ib9111b9cde86602321d1419739339814630cd649
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
1 file changed