[Bug target/116484] Allow constexpr expression in riscv_rvv_vector_bits attribute and arm_sve_vector_bits

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116484

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> (In reply to J Lee from comment #4)
> > Is this error also related to the same 'const' issue?
> 
> No that is unrelated to this attribute issue.

Well the original error message is. The rest are due to the first error
message.