This gets rid of the licence boilerplate duplicated in each file. While
there fix doubled space in domain.c author line.

No functional changes intended.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NYehezkel Bernat <yehezkelshb@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>