Bugfix dtoverlay, add media control, increase cma

recipes-bsp/bootfiles/rpi-config_%.bbappend

 do_deploy:append() {
     echo "dtoverlay=uart1" >> $CONFIG
     echo "dtoverlay=dwc2" >> $CONFIG
-    echo "dtoverlay=vc4-kms-v3d" >> $CONFIG
-    echo "dtoverlay=ov5647,media-controller=0" >> $CONFIG
+    echo "dtoverlay=vc4-kms-v3d,cma-256" >> $CONFIG
+    echo "dtoverlay=ov5647,media-controller=1" >> $CONFIG
 #    echo "dtoverlay=uart0" >> $CONFIG
 }