Convert to new override syntax

This is the result of automated script conversion:

oe-core/scripts/contrib/convert-overrides.py .

converting the metadata to use ":" as the override character instead of "_".

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

recipes-bsp/bootfiles/rpi-config_git.bb

@@ -261,7 +261,7 @@ do_deploy() {
     fi
 }
 
-do_deploy_append_raspberrypi3-64() {
+do_deploy:append:raspberrypi3-64() {
     echo "# have a properly sized image" >> $CONFIG
     echo "disable_overscan=1" >> $CONFIG