X86: Clean up interface type check for heap poisoning.

Test: ART_HEAP_POISONING=true m test-art-host-gtest
Test: ART_HEAP_POISONING=true testrunner.py --host --optimizing
Bug: 32577579
Change-Id: Icb2a838fc3a2ddcc2a50b72236afe2cd65f02e01
2 files changed