cgroup/cpuset: Rename functions dealing with DEADLINE accounting

stable inclusion
from stable-v5.10.193
commit 312713e3eae35d32539ccbd86d85d9a8ec8e9f76
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9399M

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=312713e3eae35d32539ccbd86d85d9a8ec8e9f76



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commit ad3a557d upstream.

rebuild_root_domains() and update_tasks_root_domain() have neutral
names, but actually deal with DEADLINE bandwidth accounting.

Rename them to use 'dl_' prefix so that intent is more clear.

No functional change.

Suggested-by: Qais Yousef (Google) <qyousef@layalina.io>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Qais Yousef (Google) <qyousef@layalina.io>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>