cam: Also reduce timeout for wlun probing

[imp]

Summary

wlun probing was added after my initial work on this and was overlooked
in merging forward. Add the timeout here too, for the same reasons as
for REPORT LUNS.

Fixes: 8ac7a3801c6a cam: Reduce overly long timeout values for initial device probing
Sponsored by: Netflix

[jaeyoon]

Thank you!