tree d136ce6a21e04d54d0bfa44077d6c4f61368a824
parent ec0d2ea81f2b3d69a96f5edbc634d390bb7df6e3
author Jeffy Chen <jeffy.chen@rock-chips.com> 1575543508 +0800
committer Kever Yang <kever.yang@rock-chips.com> 1577431027 +0800

doc: rockchip: document packing second level loader with mkimage

Add documentation about packing optional second level boot-loader with
mkimage tool.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>