[Bug target/115725] RISC-V: Use wrong AVL for rv64gcv_zfh_zvl512b

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115725

--- Comment #2 from Kito Cheng <kito at gcc dot gnu.org> ---
TU may not help for this case since we can't guarantee it's use v1 outside, I
mean the argument is passed via a1 (pointer) rather than passed via v1.