[riscv-port] RFR: 8280683: riscv: Remove uses of long and unsigned long [v2]

[Fei Yang]

On Fri, 28 Jan 2022 07:00:13 GMT, Yadong Wang <yadongwang at openjdk.org> wrote:

>> The riscv port should follow https://bugs.openjdk.java.net/browse/JDK-8248404, for the same reason of:
>> 
>> In many cases the RISCV64 back end uses long and unsigned long types. These types don't work on LLP64 systems (such as Windows) and should be replaced either by int64_t or jlong, as appropriate.
>> 
>> 
>> Hotspot/jdk tier1 passed on the unmatched board. And all jtreg tests have been tested on Qemu without new failures.
>
> Yadong Wang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   include a header file

Marked as reviewed by fyang (Lead).

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PR: https://git.openjdk.java.net/riscv-port/pull/55