HID: playstation: convert to use dev_groups

There is no need for a driver to individually add/create device groups,
the driver core will do it automatically for you.  Convert the
hid-playstation driver to use the dev_groups pointer instead of manually
calling the driver core to create the group and have it be cleaned up
later on by the devm core.

Cc: Roderick Colenbrander <roderick.colenbrander@sony.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>