arm64: dts: qcom: sc7280: Move USB2 controller nodes from common dtsi to SKU1

Move USB2 controller and phy nodes from common dtsi file as it is
required only for SKU1 board and change the mode to host mode as
it will be used in host mode for SKU1.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1638422248-24221-1-git-send-email-quic_c_sanm@quicinc.com