[Bug target/91886] [10 regression] powerpc64 impossible constraint in asm

[nsz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91886

--- Comment #31 from nsz at gcc dot gnu.org ---
(In reply to Segher Boessenkool from comment #28)
> [ "ws" needs at least a Power7, btw. ]

powerpc64le-* implies power8 and that's where this came up.