arm64: dts: qcom: sc7280: Set the default dr_mode for usb2

Set the default dr_mode for usb2 node to "otg" to enable
role-switch for EUD(Embedded USB Debugger) connector node.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Souradeep Chowdhury <quic_schowdhu@quicinc.com>
Link: https://lore.kernel.org/r/22fb3bbc16f3a0ae894068e4420e08ea86389817.1644339918.git.quic_schowdhu@quicinc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>