Update driver copyright.

Link: https://lore.kernel.org/r/159864896224.13630.9798419111015060967.stgit@brunhildaReviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>