[llvm] Xtensa] Implement windowed call ABI. (PR #130001)

[Andrei Safronov via llvm-commits]

andreisfr wrote:

> Missing test change

I added test for STACKRESTORE and implemented MOVSP_P pseudo operation to correctly update SP in STACKRESTORE and DYNAMIC_STACKALLOC lowering functions. 

https://github.com/llvm/llvm-project/pull/130001