nfscl: Revert part of commit 196787f79e67

Commit 196787f79e67 erroneously assumed that the client code for
Open/Claim_deleg_cur_FH was broken, but it was not.
It was actually wireshark that was broken and indicated
that the correct XDR was bogus.

This reverts the part of 196787f79e67 that changed the arguments for
Open/Claim_deleg_cur_FH.

Found during the IETF bakeathon testing event this week.

(cherry picked from commit 8efba70d7914324890b1f8fe3079036eb2b5c3db)