sony-laptop: Add support for new Sony platform API

Newer Sony Vaios provide a new API for accessing platform functionality. It
consists of a set of standardised methods for enabling events and performing
queries. These are each identified by a unique handle. This patch adds
support for calling functions based on their handle and ports the existing
code for these machines over to it.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>