ARM: dts: msm: Delete obsolete USB properties

The USB properties "qcom,otg-capability" and "otg_irq"
(used in interrupt_names) have been removed from the
bindings for the DWC3 USB device. Update the MSM/APQ
device trees accordingly.

Change-Id: I78621ab8837037e9e4d155a722e31a7d966f9c3f
Signed-off-by: Jack Pham <jackp@codeaurora.org>