[U-Boot] [PATCH] rockchip: add Kever Yang as co-custodian

[Philipp Tomsich]

> This updates MAINTAINERS and git-mailrc to add me as a
> co-custodian for rockchip
> 
> Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Acked-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Acked-by: Jagan Teki <jagan at amarulasolutions.com>
> Acked-by: Tom Rini <trini at konsulko.com>
> ---
> 
>  MAINTAINERS    | 1 +
>  doc/git-mailrc | 3 ++-
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 

Applied to u-boot-rockchip, thanks!