HID: fold ps3remote driver into generic Sony driver

Let's follow the structure we are trying to keep for most of the
specific HID drivers, and let the separation follow the producing
vendor.
Merge functionality provided by ps3remote driver into hid-sony.

Tested-by: David Dillow <dave@thedillows.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>