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 commit '0700282ff185d71cd0fb9934f7b057819f45f546' into rockchip-3.0-rbox-jb