usb: phy: Add snapshot of QUSB-V2 PHY driver

This change adds QUSB-V2 driver used on QTI MSM platforms.
This snapshot is taken as of msm-4.9 commit <64516c4613a7>
("Merge "drivers: pinctrl: qcom: Add dirconn info for sdxpoorwills"").
Also fixed compilation errors and done cleanup by removing
unwanted changes like SW workaround for disable chirp.

Change-Id: I35fc4029cc96a62ee5289e9d47e435affa66448a
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>