[pnfs] CVS: nfsv4

[Rahul Iyer NetApp]

CVSROOT:	/cvs
Module name:	nfsv4
Changes by:	iyer at citi.	2006/07/31 19:32:59

Modified files:
	cvs/pnfs/fs/nfs: nfs4filelayout.c read.c write.c 

Log message:
A fix to isolate the dense layout specific changes to the layout driver only
This commit does the following:
- Removes the dense layout related code from fs/nfs/read.c and fs/nfs/write.c
- Adds a rpc_call_done struct for the file layout driver (nfs4filelayout.c)
- Uses the above call_ops instead of the standard nfs call_ops