leds: qti-flash: Add flash active property

Set flash active power supply property to indicate
the flash module is active or inactive, which updates
flash status to charger.

Change-Id: I01ad24d92bec5b16f3d0217813965d86d3d38738
Signed-off-by: Kavya Nunna <knunna@codeaurora.org>
2 files changed