ARM: dts: Enable USB QMP PHY PLL calibration

Set "qcom,pll-calibration" property to programm
required PHY register to get it out of reset for
mdm9630 version 2 hardware.

Change-Id: I091251d0df733cd59a8458ce8a608944c186e0b5
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>