ARM: dts: msm: Add USB 3.0 device entries to msm8994

Add device node definitions for the USB 3.0 controller,
the HS and SS PHYs, and the USB BAM. Define three BAM
pipes, two for IPA and one for QDSS.

These are initially disabled, and can be enabled in
the respective platform DTS files.

Change-Id: I1298094f2864ab369af1d3b279ec5d625ba17a6b
Signed-off-by: Jack Pham <jackp@codeaurora.org>