[aarch64-port-dev ] RFR/Feedback(S) 8248663: AArch64: Avoid existing macros/keywords of MSVC

[Monica Beckwith]

These changes are concerning specific macro names or keywords used by MSVC. E.g. `mvn,` `DIFFERENCE` and `far.` We are proposing to change those in the shared code.

JBS: https://bugs.openjdk.java.net/browse/JDK-8248663
Webrev: https://cr.openjdk.java.net/~mbeckwit/8248663/webrev.00/

Thanks,
Monica