Grow: don't try setting new geometry when restarting a native reshape.

md won't let us change raid_disks in this case, so don't even try.

Signed-off-by: NeilBrown <neilb@suse.de>

Grow.c

@@ -1931,6 +1931,11 @@ started:
 
 			goto release;
 		}
+	} else if (info->reshape_active && !st->ss->external) {
+		/* We don't need to set anything here for internal
+		 * metadata, and for kernels before 2.6.38 we can
+		 * fail if we try.
+		 */
 	} else {
 		/* set them all just in case some old 'new_*' value
 		 * persists from some earlier problem.