phy: Add Qualcomm QUSB2 USB PHY driver

Several Qualcomm SoCs support QUSB2 USB PHY (for e.g.
SM6115 and SDM845 - the corresponding boards being QRB4210-RB2 and
Dragonboard845c-RB3).

Add PHY driver for the same.

Using this driver, the USB Hub connected on board on RB2, can
be successfully enumerated via '> usb start'.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
3 files changed