block: return errors from blk_register_region
hulk inclusion category: bugfix bugzilla: 188733 ---------------------------------------- Modify the return value type of blk_register_region to prepare for adding error handling. Signed-off-by:Zhong Jinghua <zhongjinghua@huawei.com> Signed-off-by:
Li Nan <linan122@huawei.com>
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