ARM: dts: msm: Fix DP and USB1 concurrency issue on all SA8155 designs

On SA8155 designs, the SS lanes from the USB1 port are unused and
they are dedicated to be used by DP. If display is in use, USB
does not switch to high speed mode and peripheral mode fails. Fix
this by setting the maximum speed for USB1 to high-speed from DT.

Change-Id: I46a359f5cb5d2a80570704e7364da1f19db10360
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>