CVBS output

The patch that suports CVBS output is as below，and it is mainly used
to modify the DTS files.

   --- a/kernel/arch/arm/boot/dts/px3se-fireprime.dts
   +++ b/kernel/arch/arm/boot/dts/px3se-fireprime.dts
   @@ -45,8 +45,8 @@
    #include "rk3128.dtsi"
    #include "rk3128-cif-sensor.dtsi"
    #include "px3se-sdk.dtsi"
   -//#include "lcd-lsl070nl01.dtsi"
   -#include "lcd-box.dtsi"
   +#include "lcd-lsl070nl01.dtsi"
   +//#include "lcd-box.dtsi"
    //#include "lcd-b101ew05.dtsi"
    #include <dt-bindings/rkfb/rk_fb.h>
    #include <dt-bindings/input/input.h>
   @@ -186,9 +186,9 @@
           };
    };

   -&disp_timings {
   +/*&disp_timings {
        native-mode = <&timing0>;
   -};
   +};*/


    &rk_screen {
   @@ -228,7 +228,12 @@
    };

    &hdmi {
   -       status = "okay";
   +       status = "disabled";
   +};
   +
   +&tve {
   +    status = "okay";
   +    test_mode = <0>;
    };

    &sdmmc {

When you open the CVBS directly, the HDMI cannot output normally.
Please modify the "status" of  HDMI  as "disabled",  also note that
the "status" of the LVDS is also "disabled", otherwise error occurs.