[compiler-rt] Sanitizer/MIPS: Use $t9 for preemptible function call (PR #76894)

[YunQiang Su via llvm-commits]

wzssyqa wrote:

> @MaskRay From your last set of comments were you going to make some changes to this?

This is the history in review.llvm.org.

https://github.com/llvm/llvm-project/pull/76894