RFR: 8286056: AArch64: clarify uses of MacroAssembler::far_call/MacroAssembler::far_jump [v2]

[Vladimir Kozlov]

On Wed, 4 May 2022 18:27:14 GMT, Evgeny Astigeevich <duke at openjdk.java.net> wrote:

>> `MacroAssembler::far_call`/`MacroAssembler::far_jump` are for generating calls of/jumps to targets which are inside `CodeCache` and can `relocInfo` types: `external_word_type`, `runtime_call_type` or `none`.
>> This PR updates the description of the functions and adds an assert checking a `relocInfo` type.
>> Tested a fastdebug build:
>> - `gtest`: Passed
>> - `tier1`: Passed
>
> Evgeny Astigeevich has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add additional comments to far_call/far_branch

Looks good.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8534