Update copyrights to 2020 for files modified in the 12.6.0.4 patch set.

Link: https://lore.kernel.org/r/20200128002312.16346-13-jsmart2021@gmail.comSigned-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>