mm: Extend mmap assocated functions to accept mm_struct

ascend inclusion
category: Feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8LNGH



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The do_mmap/mmap_region/__mm_populate/do_mbind could only be used to handle
the current process, now the share pool need to handle the other process
and create memory mmaping, so need to export new function to distinguish
different process and handle it, it would not break the current logic
and only valid for share pool.

Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com>