ARM: dts: msm: Allow PLL tune on PHY init

Adding the required flag to include PLL tuning as
part of PHY initialization sequence.

Change-Id: I1295719d42c6daf519f16a816f7ee242b5474841
Signed-off-by: Bar Weiner <bweiner@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>