[Sanitizer] Linux refactor shadow huge page mode handling

Disabling Transparent huge page mode refactored in one function.

Reviewers: vitalybuka

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D65771

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367925 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed