Revert "ART: Fix breaking changes from recent VIXL update."

This reverts commit 92699f9292e11b414b9fbd8083d628b7686a34e8.

Reason for revert: Breaks ASAN host builds
(`art/test/testrunner/run_build_test_target.py -j30 art-gtest-asan`).

Change-Id: Icd9b6fc4216bd20ff0ed0a3eec786932295ff94b
1 file changed