rework langinfo code for ABI compat and for use by time code

[musl] / src / thread / microblaze / __set_thread_area.s

.global __set_thread_area
.type   __set_thread_area,@function
__set_thread_area:
        ori      r21, r5, 0
        rtsd     r15, 8
        ori      r3, r0, 0