AdoptOpenJDK builds of jdk-16 on AIX started failing 4 days ago after merging of JDK-8253180:
```
04:54:16 ./src/hotspot/os/aix/safepointMechanism_aix.cpp:109:3: error: use of undeclared identifier '_poll_armed_value'
04:54:16 _poll_armed_value = reinterpret_cast<void*>(bad_page_val + poll_bit());
04:54:16 ^
04:54:17 ./src/hotspot/os/aix/safepointMechanism_aix.cpp:110:3: error: use of undeclared identifier '_poll_disarmed_value'
04:54:17 _poll_disarmed_value = reinterpret_cast<void*>(good_page_val);
04:54:17 ^
```