NFSD: Using min/max/min_t/max_t for calculate

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --cc fs/nfsd/nfs3proc.c
Simple merge

diff --cc fs/nfsd/nfs3xdr.c
Simple merge

diff --cc fs/nfsd/nfs4proc.c
Simple merge

diff --cc fs/nfsd/nfs4xdr.c
Simple merge

diff --cc fs/nfsd/nfsctl.c
Simple merge

diff --cc fs/nfsd/nfssvc.c
Simple merge

diff --cc fs/nfsd/nfsxdr.c
Simple merge

diff --cc fs/nfsd/vfs.c
Simple merge