[RESEND PATCH 1/1] RISC-V: Update Zihintpause extension version

[Kito Cheng]

> Just for my own education: Isn't the general versioning scheme using
> 2.x only for non-draft functionality?

Version scheme has *slightly* changed, RISC-V uses 2.0 as raritfed
version number, and 2.x for non-draft functionality change,
and now RISC-V uses 1.0 as a ratified version.

More discussion you can found here:

https://sourceware.org/pipermail/binutils/2022-February/119587.html

But I must say I still can't figure out what happened on zihintpause
after reading the thread...