Fix dtrace SDT probe tcp:::debug-input

The tcp:::debug-input probe is passed an mbuf pointer, use the correct
translator for ipinfo_t when defining tcp:::debug-input.

Fixes: 82988b50a17c ("Add an mbuf to ipinfo_t translator to finish ...")
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D33066

(cherry picked from commit 08d157a8321c845dad9f2d6eecea07639a23411a)