NFS: Remove page group limit in nfs_flush_incompatible()

nfs_try_to_update_request() should be able to cope now.
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/write.c

@@ -1205,8 +1205,6 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
 		l_ctx = req->wb_lock_context;
 		do_flush = req->wb_page != page ||
 			!nfs_match_open_context(req->wb_context, ctx);
-		/* for now, flush if more than 1 request in page_group */
-		do_flush |= req->wb_this_page != req;
 		if (l_ctx && flctx &&
 		    !(list_empty_careful(&flctx->flc_posix) &&
 		      list_empty_careful(&flctx->flc_flock))) {