usb: phy: qmp: Add support for PHY PLL calibration

On few hardware version, it is required to configure
few PHY register with different value to get PHY out
of reset. This change adds support for the same. This
can be enabled by setting property "qcom,pll-calibration".

Change-Id: I03315bdd282ca04655a56be7c0f6a8302de517de
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>