ACPI / PM: Do not execute _PS0 for devices without _PSC during initialization

ACPI / PM: Do not execute _PS0 for devices without _PSC during initialization

Commit b378549 (ACPI / PM: Do not power manage devices in unknown
initial states) added code to force devices without _PSC, but having
_PS0 defined in the ACPI namespace, into ACPI power state D0 by
executing _PS0 for them.  That turned out to break Toshiba P870-303,
however, so revert that code.

References: https://bugzilla.kernel.org/show_bug.cgi?id=58201
Reported-and-tested-by: Jerome Cantenot <[email protected]>
Tracked-down-by: Lan Tianyu <[email protected]>
Cc: 3.9+ <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>