[LLDB][ARM] Generalise adding register state in emulation tests and add D registers

Since some s and d registers overlap we will error if we find both.
This prevents you overwriting one with the other in a test case.

Reviewed By: clayborg

Differential Revision: https://reviews.llvm.org/D130462

GitOrigin-RevId: 290c4bc7be45a29d98ea2e8460ef50f4924a1c4b
2 files changed