x86/sev: Take NUMA node into account when allocating memory for per-CPU SEV data

per-CPU SEV data is dominantly accessed from their own local CPUs,
so allocate them node-local to improve performance.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Nikunj A Dadhania <nikunj@amd.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lore.kernel.org/r/20240412030130.49704-1-lirongqing@baidu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>