[llvm] [GISel][TableGen] Generate getRegBankFromRegClass (PR #99896)

[Thorsten Schütt via llvm-commits]

tschuett wrote:

Could you put the output for e.g. PowerPC here:
https://github.com/llvm/llvm-project/tree/main/llvm/test/TableGen
Just for eyes.

https://github.com/llvm/llvm-project/pull/99896