pnfs: move common blocklayout XDR defintions to nfs4.h

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --cc fs/nfs/blocklayout/blocklayout.h
Simple merge

diff --cc fs/nfs/blocklayout/extent_tree.c
Simple merge

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

diff --cc fs/nfsd/blocklayoutxdr.h
Simple merge

diff --cc include/linux/nfs4.h
Simple merge