[Bug target/109228] warning: implicit declaration of function '__riscv_vlenb'

[jan.wassenberg at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109228

--- Comment #6 from Jan Wassenberg <jan.wassenberg at gmail dot com> ---
Nice, thank you Mathieu, Kito and JuzheZhong!