usbcamera:new version for supporting usb camera
Merge branch 'master' of 10.10.10.211:rk3188/box/4.2.2_r1
Important update:solve system crash problem of probability
                 caused by DDR frequency.
3188 costdown,rk808+rk616+rk1000
merge the rockchip_mirror branch
Merge commit 'cb39633ea7975e43dd098e173024f4598d9d9c8d' into radxa/radxa-dev-jb