libceph: kill off osd data write_request parameters

In the incremental move toward supporting distinct data items in an
osd request some of the functions had "write_request" parameters to
indicate, basically, whether the data belonged to in_data or the
out_data.  Now that we maintain the data fields in the op structure
there is no need to indicate the direction, so get rid of the
"write_request" parameters.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

fs/ceph/file.c

@@ -585,8 +585,8 @@ more:
 			own_pages = true;
 		}
 	}
-	osd_req_op_extent_osd_data_pages(req, 0, true, pages, len,
-					page_align, false, own_pages);
+	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
+					false, own_pages);
 
 	/* BUG_ON(vino.snap != CEPH_NOSNAP); */
 	ceph_osdc_build_request(req, pos, snapc, vino.snap, &mtime);