Improve the 1GbE Stability

You may use the following command to enhance the shared GbE in NRU-52S+, or the 1GbE on NRU-51V+.

# Change the default 1GbE driver from Realtek R8169 to R8168 by blackling list the default driver
# R8169 driver is maintained by Linux Kernel Team, R8168 is maintained by Realtek directly
# Ref: https://forums.developer.nvidia.com/t/how-to-remove-r8169-linux-kernel-module/249718

# sudo vim /etc/modprobe.d/blacklist-r8169.conf
blacklist r8169