binder: remove kernel vm_area for buffer space

mainline inclusion
from mainline-v5.1-rc1
commit 88021166
category: bugfix
bugzilla: 188431, https://gitee.com/src-openeuler/kernel/issues/I6DKVG
CVE: CVE-2023-20938

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=880211667b203dd32724f3be224c44c0400aa0a6



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Remove the kernel's vm_area and the code that maps
buffer pages into it.

Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Li Huafei <lihuafei1@huawei.com>
Reviewed-by: Zheng Yejian <zhengyejian1@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>