ARM: dts: msm: Fix camera flash LED configurations for sm8150 platforms

Fix camera led flash PMIC source phandles in order to trigger
correct flash/torch node with respective image sensor. Also, correct
analog/auto_focus voltage required in order to set regulator voltage
correctly.

Change-Id: I9a89e04fa02201be2aa43d431f453640d2efd19a
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>