ARM: dts: msm: Limit USB speed to high speed for Kona QRD

As re-driver is not enabled on Kona QRD, limit USB speed to
high speed firstly to avoid unstable issue on USB super speed.

Change-Id: I69a58fd88837d1ae8a03b28bdd18bfecfb15c88d
Signed-off-by: Liangliang Lu <luliang@codeaurora.org>