[llvm] [X86][GlobalISel] Enable G_SDIV/G_UDIV/G_SREM/G_UREM (PR #81615)

[Evgenii Kudriashov via llvm-commits]

e-kud wrote:

> They show the SUBREG_TO_REG, but SUBREG_TO_REG is often misunderstood and there's nothing that can check that is correctly used.

@topperc maybe we can add a subreg-superreg check to `MachineVerifier`? 

https://github.com/llvm/llvm-project/pull/81615