remoteproc: qcom: q6v5: Avoid setting smem bit in case of crash shutdown

Avoid setting smem bit in case of crash shutdown, as remote
processor is not able to send the ack back.

Signed-off-by: Gokul krishna Krishnakumar <quic_gokukris@quicinc.com>
[bjorn: Rewrote the comment]
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/9e549a54e2a6ede3e413de933fd1725c660993c3.1662995608.git.quic_gokukris@quicinc.com