usb: phy: Add snapshot of USB QUSB PHY driver

This change adds USB QUSB PHY driver used on QTI MSM
platforms. This snapshot is taken as of msm-4.14
commit <5d683bcd0aa0> ("Merge "ARM: dts: msm: Add audio
over usbc platform for atoll"").

Change-Id: I263e2fce8a91a4d9c2302373d39e9a1f418df789
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>