arm64/ascend: mm: Fix arm32 compile warnings

ascend inclusion
category: bugfix
bugzilla: NA
CVE: NA

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The vm_flags will overflow on arm32 as left shift CHECKNODE_BITS(48).

This checknode function only used in cdm feature.

Fixes: cdccf4d4b7b5 ("arm64/ascend: mm: Add MAP_CHECKNODE flag to check node hugetlb")
Signed-off-by: Fang Lijun <fanglijun3@huawei.com>
Reviewed-by: Ding Tianhong <dingtianhong@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>