rbd: move rbd_dev_refresh() definition

stable inclusion
from stable-v5.10.198
commit 7c4f11d73b2425420c0a6e2d5d8a37eee36dad17
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I987V5

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7c4f11d73b2425420c0a6e2d5d8a37eee36dad17



--------------------------------

commit 0b035401 upstream.

Move rbd_dev_refresh() definition further down to avoid having to
move struct parent_image_info definition in the next commit.  This
spares some forward declarations too.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Dongsheng Yang <dongsheng.yang@easystack.cn>
[idryomov@gmail.com: backport to 5.10-6.1: context]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>