[Dell]: DellEMC S6100 disable pericom/xlinx chipset (#4868)

- Xilinx/pericom peripherals are not actively used in DellEMC S6100 switch.
- These peripherals are throwing PCIE corrected messages in some of the units and filling syslog.
- Since it is not usable disabling it at startup.

platform/broadcom/sonic-platform-modules-dell/s6100/scripts/s6100_platform.sh

@@ -254,6 +254,8 @@ remove_python_api_package() {
 init_devnum
 
 if [[ "$1" == "init" ]]; then
+
+    pericom="/sys/bus/pci/devices/0000:08:00.0"
     modprobe i2c-dev
     modprobe i2c-mux-pca954x force_deselect_on_exit=1
     modprobe dell_ich
@@ -262,6 +264,10 @@ if [[ "$1" == "init" ]]; then
     modprobe nvram
     systemctl start s6100-reboot-cause.service
 
+    # Disable pericom/xilinx
+    echo 1 > /sys/bus/pci/devices/0000:02:00.0/remove
+    [ -d $pericom ] &&  echo 1 > $pericom/remove
+
     # Disable Watchdog Timer
     if [[ -e /usr/local/bin/platform_watchdog_disable.sh ]]; then
         /usr/local/bin/platform_watchdog_disable.sh