RFR(S): JDK-8230962 Aarch64: Fix fast class initialization checks after merge

[Dmitry Samersoff]

Hello Everybody,

Please review:

http://cr.openjdk.java.net/~dsamersoff/valhalla_lw2/webrev.25/

Implemented fast class initialization check and fixed couple of minor
errors that brakes AArch64 port of Valhalla.

Please notice, that C1 support is in progress, but enable by default so
you have to explicitly disable Tiered Compilation to run the port.


-Dmitry