ARM: dts: msm: Enable auto calibration for PM855L WLED

Enable auto calibration feature in PM855L WLED so that the sink
configuration can be fixed automatically if it is misconfigured.
This prevents a possible hardware damage.

Change-Id: Ia1e58538f53bc3ed6a362c7aac919841cc523141
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>