kernel/generic: Fixed cscal and zscal

[XiWeiGu]

Add a flag parameter like in #4794 to fix zscal and cscal.

[XiWeiGu]

@martin-frbg, I’d appreciate any thoughts or recommendations you might have on this PR.

[martin-frbg]

Nothing to remark, I simply do not have as much time to focus on OpenBLAS right now (the government contract enabling me to spend actual work hours on OpenBLAS has ended and I have a backlog of totally unrelated projects to attend to, also I have been unwell lately) .
Ideally I would like to have corresponding fixes ready for all the other platforms when I merge this - we are still a few weeks away from the tentative release date for 0.3.30.

[XiWeiGu]

I completely understand. It sounds like you have a lot on your plate right now. I hope you're able to take care of yourself and get some rest. Wishing you a speedy recovery and hoping things ease up for you soon!
Loongson (including myself) hopes to be more deeply involved in OpenBLAS community development. We are committed to dedicating manpower to assist. If you’re open to it, you can delegate some tasks from your to-do list to us—such as testing and assembly-level revisions—so you can be relieved from these tasks.If you feel that anything I’ve said is offensive, please feel free to disregard my words.