CAM calls the SIM action callback with the SIM lock and the CAM
device lock held. The XPT_RESET_DEV handler called
ufshci_dev_reset(), which sleeps on device commands. Sleeping there
panics when another thread contends for the lock: "panic: sleeping
thread holds CAM device lock".

Report success without touching the device, as nvme_sim(4) does.
A real device reset needs the controller reset path. That rework is
planned together with in-flight request recovery.

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