LinuxKPI: 802.11: fix lkpi_lsta_dump() debugging

Fix two last-minute changes of d9f59799fc3e7940c47aa674c25994e640eae45e:
(1) for consitency name the debugging function lkpi_lsta_dump()
(2) pass in the original node (ni) rather than taking it from the lsta

to avoid problems realted to bss_update as mentioned in the above
commit.

No functional changes for users.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
X-MFC with: d9f59799fc3e7940c47aa674c25994e640eae45e