of some abnormal branches

ascend inclusion
category: feature
bugzilla: NA
CVE: NA

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

1. sp_group_add_task: when spg invalid, low 32bits of
pointer spg will be returned. This will be considered
a correct spg id.

2.sp_alloc: The error branch goto out, then sp_mutex
will be unlocked incorrectly(since not be locked).
Signed-off-by: NZhou Guanghui <zhouguanghui1@huawei.com>
Signed-off-by: NTang Yizhou <tangyizhou@huawei.com>
Reviewed-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>