ARM: dts: msm: Set qcom,default-mode-none for sec USB on kona

Secondary USB controller is starting in peripheral mode by default
on QRD. Secondary USB port is not present on QRD. Set
qcom,default-mode-none so that USB controller and phy enter into
low power mode.

Change-Id: I5ecba5c8359152a2937ac941749dfd7a83d8a371
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>