x86/ACPI: re-park previously parked CPUs upon resume from S3

x86/ACPI: re-park previously parked CPUs upon resume from S3

Aiui when resuming from S3, CPUs come back out of RESET/INIT. Therefore
they need to undergo the same procedure as was added elsewhere by
commits d8f974f1a6 ("x86: command line option to avoid use of secondary
hyper-threads") and 8797d20a6e ("x86: possibly bring up all CPUs even
if not all are supposed to be used").

Just like done at boot time, avoid (at least pointlessly) using
stop-machine logic.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>