ACPI: processor: Reduce the log level of a per-CPU message about idle states

This made the CPU bootup faster, otherwise Linux spends lots
of time to printing nonsense information for each CPU when
there are lots of CPUs.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Link: https://patch.msgid.link/20240719145330.9430-1-lirongqing@baidu.com


[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>