alinux: doc: use unified official project name Cloud Kernel

Cloud Kernel is the official name of our project, this patch unitizes
the project names used in docs and comments.
Signed-off-by: NCaspar Zhang <caspar@linux.alibaba.com>
Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

Documentation/alibaba/interfaces.rst

 .. SPDX-License-Identifier: GPL-2.0+
 
-=============================
-AliOS Cloud kernel interfaces
-=============================
+=======================
+Cloud Kernel interfaces
+=======================
 
-This file collects all the interfaces specific to AliOS Cloud kernel.
+This file collects all the interfaces specific to Cloud Kernel.
 
 memory.wmark_min_adj
 ====================

mm/vmscan.c

@@ -248,7 +248,7 @@ static bool sane_reclaim(struct scan_control *sc)
 	if (!memcg)
 		return true;
 #ifdef CONFIG_CGROUP_WRITEBACK
-	/* AliOS Cloud Kernel has cgroup writeback support for v1 */
+	/* Cloud Kernel has cgroup writeback support for v1 */
 	if (cgroup_subsys_on_dfl(memory_cgrp_subsys) ||
 	    cgwb_v1)
 		return true;