sparc64: Fixes NUMA node cpulist sysfs file in single NUMA node case.

sparc64: Fixes NUMA node cpulist sysfs file in single NUMA node case.

Forward port 23175351 to UEK4

The sysfs file /sys/devices/system/node/node0/cpulist is incorrect in the
single node case on sun4v machines as the machine description record in this
case does not contain any NUMA information. A default list from 0 to NR_CPUS
was used prior. This file is read by utilities such as 'numactl --hardware'
and lscpu to show CPU-to-node assignment.

In order to fix this issue, the numa_cpumask_lookup_table is cleared at
bootup. Whenever an extra cpu is bringup via __cpu_up, the corresponding
cpu mask is set in the numa_cpumask_lookup_table.

Orabug: 24500614
Orabug: 22546851

Signed-off-by: Chris Hyser <chris.hyser@oracle.com>
Signed-off-by: Thomas Tai <thomas.tai@oracle.com>