Second UV Update PatchSet containing:
* Fix the panic where KEXEC'd kernel does not have access to
EFI runtime mappings.
* Fix the panic with 2 socket configs.
* Recognition and initialization of UV Hubless systems.
* Addition of UV Hubless support for RMC system NMI command.
* Addition of a basic CPU health check using NMI.
* Verify new NMI action is valid.
* Default NMI action standardized on "dump" (stack/regs).
* Move check for "is UV system" from native_smp_prepare_cpus() to
uv_system_init() since it needs to now check for hubless as well.
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