conf/devices/raspberrypi-64/config.conf: Fix RPi 5 hw rev. 1.1 support

Details here: agherzan/meta-raspberrypi#1460

Author: thomas-roos

meta-aws-demos/conf/devices/raspberrypi-64/config.conf

@@ -10,3 +10,6 @@ ENABLE_UART = "1"
 
 # https://meta-raspberrypi.readthedocs.io/en/latest/ipcompliance.html
 LICENSE_FLAGS_ACCEPTED = "synaptics-killswitch"
+
+# necessary as long as this PR is not merged: https://github.com/agherzan/meta-raspberrypi/pull/1460
+RPI_KERNEL_DEVICETREE_OVERLAYS:append = " overlays/bcm2712d0.dtbo"