[Bug target/70453] gcc generates invalid instruction vextractu64x4 (should be: vextracti64x4)

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70453

--- Comment #3 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Created attachment 38133
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38133&action=edit
Proposed patch

I am reg-testing trivial patch