leds: leds-qpnp-flash: enable/disable input current limit

Add support to enable/disable input current limit for charger
when flash module is enabled and disabled respectively. This change
is useful to redule the time to regulate volatage for flash LED.

Signed-off-by: Jigarkumar Kishorkumar Zala <j_zala@codeaurora.org>
Change-Id: I8188a6c849b4e8b57d47780d9ce1d3a7b0e9d3da