RP2040: add post_install linux script

Use the same script to add rules for Portenta and any other board that doesn't use CDC / plugdev method

Author: facchinm

post_install.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+rp2040rules () {
+    echo ""
+    echo "# Raspberry Pi RP2040 bootloader mode UDEV rules"
+    echo ""
+cat <<EOF
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="2e8a", MODE:="0666"
+EOF
+}
+
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root"
+  exit
+fi
+
+rp2040rules > /etc/udev/rules.d/60-rp2040.rules
+
+# reload udev rules
+echo "Reload rules..."
+udevadm trigger
+udevadm control --reload-rules