arm64: dts: qcom: sc7280: Add WPSS remoteproc node

Add the WPSS remoteproc node in dts for
PIL loading.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rakesh Pillai <quic_pillair@quicinc.com>
Signed-off-by: Manikanta Pubbisetty <quic_mpubbise@quicinc.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220328070701.28551-1-quic_mpubbise@quicinc.com