staging: r8712u: Merging Realtek's latest (v2.6.6). Added Larry's copyright.

Larry Finger's copyright addendum has now been included in the
banners.
The files involved in this commit have had only their banners
changed; there have been no other mods.

Signed-off-by: Ali Bahar <ali@internetDog.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>