[celestica]: Fix E1031 udev rules not work for sonic os first boot af…

…ter be installed (#7043)

Use udevadm to trigger the udev rules on the first boot

How to verify:

- Connect C0 with E1031;
- Install or upgrade the sonic os to 202012 branch;
- When access to sonic check if /dev/C0-1 to /dev/C0-48 are existed.

platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.postinst

@@ -1,10 +1,12 @@
 depmod -a
+sudo chmod +x /usr/local/bin/udev_prefix.sh
+sudo chmod +x /usr/local/bin/popmsg.sh
+sudo chmod +x /usr/local/bin/reload_udev.sh
 systemctl enable platform-modules-haliburton.service
 systemctl enable fancontrol.service
 
 systemctl start platform-modules-haliburton.service
 systemctl start fancontrol.service
 
 /usr/local/bin/platform_api_mgnt.sh install
-sudo chmod +x /usr/local/bin/udev_prefix.sh
-sudo chmod +x /usr/local/bin/popmsg.sh
+/usr/local/bin/reload_udev.sh

platform/broadcom/sonic-platform-modules-cel/haliburton/script/reload_udev.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+UDEV_DIR=/etc/udev/rules.d/50-ttyUSB-C0.rules
+TTYUSB_DIR=/dev/ttyUSB
+
+if [ -f "$UDEV_DIR" ]; then
+        for i in {0..95}
+        do
+                ttydev=$TTYUSB_DIR$i
+                if [ -c "$ttydev" ]; then
+                        udevadm trigger -c add $ttydev
+                fi
+        done
+fi