This patch add GPIO configuration support in mvpp2x driver.
Driver will handle 10G SFP gpio reset and SFP TX disable. GPIO pins should
be set in device tree.
Signed-off-by: Stefan Chulski <stefanc@marvell.com> Tested-by: iSoC Platform CI <ykjenk@marvell.com> Reviewed-by: Kostya Porotchkin <kostap@marvell.com> Reviewed-by: Igal Liberman <igall@marvell.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com> Signed-off-by: Stefan Roese <sr@denx.de>