NFS: Rename nfs_commit_unstable_pages() to nfs_write_inode()

All nfs_write_inode() does is pass its arguments to
nfs_commit_unstable_pages().  Let's cut out the middle man and have
nfs_write_pages() do the work directly.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/write.c

@@ -1812,7 +1812,7 @@ int nfs_commit_inode(struct inode *inode, int how)
 	return res;
 }
 
-static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_control *wbc)
+int nfs_write_inode(struct inode *inode, struct writeback_control *wbc)
 {
 	struct nfs_inode *nfsi = NFS_I(inode);
 	int flags = FLUSH_SYNC;
@@ -1847,11 +1847,6 @@ static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_contr
 	__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
 	return ret;
 }
-
-int nfs_write_inode(struct inode *inode, struct writeback_control *wbc)
-{
-	return nfs_commit_unstable_pages(inode, wbc);
-}
 EXPORT_SYMBOL_GPL(nfs_write_inode);
 
 /*