other tools/implementations

[orangecms]

• https://github.com/collabora/rockchiprs
• https://github.com/xboot/xrock
• https://github.com/rockchip-linux/rkdeveloptool/blob/master/RKDevice.cpp
• https://github.com/linux-rockchip/rkflashtool/blob/master/rkflashtool.c
• https://opensource.rock-chips.com/wiki_Upgradetool
• https://opensource.rock-chips.com/wiki_Rockusb