ARM: dts: msm: Add QRTR MHI DEV device for sdxprairie

Add the QRTR MHI DEV transport to enable communication over pcie from
the device to the host. Use Net ID 3 to enable QRTR forwarding from the
host to the modem co-processor.

Change-Id: I8333e3d84e129bed5c88b53f9219dadfa18b61e5
Signed-off-by: Chris Lew <clew@codeaurora.org>