nfscl: Add support for CB_RECALL_ANY to the NFSv4.1/4.2 client

Commit f5aff1871d32 and 7e26f1c21049 moved the delegation
and layout high water variables into the clientID structure.
This patch uses those variables to implement the
CB_RECALL_ANY NFSv4.1/4.2 callback.

This patch only affects NFSv4.1/4.2 mounts to non-FreeBSD
NFS servers that use CB_RECALL_ANY. The Linux knfsd is
one example of such a server.

MFC after: 2 weeks