[Bug target/91900] [10 regression] mipsisa64r6-*-* rejects lo clobber

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91900

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
mipsisa64r6 does not have the lo register. So clobbering it does not make
sense.