staging: gasket: apex: enable power save mode by default

Set default value of allow_power_save parameter to enable power save
mode, which is expected to be the state usually desired.

Signed-off-by: Marty Faltesek <mfaltesek@google.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>