tici: ensure DSP permissions are setup on boot (#31530)

Co-authored-by: Comma Device <device@comma.ai>

launch_chffrplus.sh

@@ -15,6 +15,11 @@ function agnos_init {
   # set success flag for current boot slot
   sudo abctl --set_success
 
+  # TODO: do this without udev in AGNOS
+  # udev does this, but sometimes we startup faster
+  sudo chgrp gpu /dev/adsprpc-smd /dev/ion /dev/kgsl-3d0
+  sudo chmod 660 /dev/adsprpc-smd /dev/ion /dev/kgsl-3d0
+
   # Check if AGNOS update is required
   if [ $(< /VERSION) != "$AGNOS_VERSION" ]; then
     AGNOS_PY="$DIR/system/hardware/tici/agnos.py"