Currently, `__attribute__((target("lasx")))` does not automatically
enable LSX support, causing Clang to fail with `-mno-lsx`. Since
LASX depends on LSX, enabling LASX should implicitly enable LSX to
avoid clang error.
Fixes#149512.
Depends on #153541
(cherry picked from commit a1b6e7ff393533a5c4f3bdfd4efe5da106e2de2b)