RFR: 8286058: AArch64: clarify types of calls [v4]

[Evgeny Astigeevich]

> The PR clarifies the types of calls AArch64 OpenJDK uses. It cleans up far_call, far_jump and trampoline_call. It removes trampoline_call1 because its use cases are now supported by trampoline_call.
> Tested a fastdebug build:
> - `gtest`: Passed
> - `tier1`...`tier3`: Passed

Evgeny Astigeevich has updated the pull request incrementally with one additional commit since the last revision:

  Update comments; Remove code changes

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8564/files
  - new: https://git.openjdk.java.net/jdk/pull/8564/files/56c354f3..0f1fb9bc

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8564&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8564&range=02-03

  Stats: 64 lines in 5 files changed: 31 ins; 8 del; 25 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8564.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8564/head:pull/8564

PR: https://git.openjdk.java.net/jdk/pull/8564