add overlay to enable v4l2 devices

Overlay for testing purposes:
Maybe it is possible to use hardware video-encoding on that chip.

patch/kernel/archive/rockchip64-6.12/overlay/Makefile

@@ -21,6 +21,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
 	rockchip-rk3328-i2c0.dtbo \
 	rockchip-rk3328-i2s1-pcm5102.dtbo \
 	rockchip-rk3328-mksklipad50-enable-rtc-end1.dtbo \
+	rockchip-rk3328-mksklipad50-enable-v4l2.dtbo \
 	rockchip-rk3328-mkspi-disable-lcd-spi.dtbo \
 	rockchip-rk3328-opp-1.4ghz.dtbo \
 	rockchip-rk3328-opp-1.5ghz.dtbo \

patch/kernel/archive/rockchip64-6.12/overlay/README.rockchip-overlays

@@ -24,6 +24,11 @@ testing the rtc.
 The rtc still tends to stall sometimes. In the original makerbase
 image, the rtc was completely unusable though.
 
+### mksklipad-enable-v4l2
+
+Enables the video4linux devices /dev/video[012] /dev/media[01]
+Not sure, if they are of any use.
+
 ### mkspi-disable-lcd-spi
 
 DTBO to disable spi_for_{lcd,touch} when enabling uart1

patch/kernel/archive/rockchip64-6.12/overlay/rockchip-rk3328-mksklipad50-enable-v4l2.dtso

@@ -0,0 +1,18 @@
+/dts-v1/;
+/plugin/;
+
+// disable /dev/video1 + /dev/media0
+&vpu {
+        status = "okay";
+};
+
+// disable /dev/video2 + /dev/media1
+&vdec {
+        status = "okay";
+};
+
+// disable /dev/video0
+&rga {
+        status = "okay";
+};
+