ascend: export interfaces required by ascend drivers

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8OX3Q


CVE: NA

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Export oom_type_notifier_call and __get_vm_area_caller.
Export pm_autosleep_set_state and __vmalloc_node_range.
Export alloc_workqueue_attrs, free_workqueue_attrs
and apply_workqueue_attrs.
Export find_get_task_by_vpid.

Signed-off-by: Yuan Can <yuancan@huawei.com>