ARM: dts: msm: Add flash/torch devices for WLED on PM8150L

Add flash and torch device for PM8150L WLED to support front
camera flash on SM8150 platforms.

Change-Id: I5a1cc1d04ef9b3aa6b1d719e2f11cfa12792a245
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>