[AMDGPU][MC] Attempt to fix build after e83e53b702714

See https://github.com/llvm/llvm-project/pull/96461#issuecomment-2212381515

[AMDGPU][MC] Allow UC_VERSION_* constant reuse (#96461)

If more than one disassembler is created for a context then allow reuse
of existing constants.
Warn if constants values do not match.