Edited port_config.ini files for all the 4600c for difference of 4. Co-authored-by: Vivek Reddy Karri <vkarri@nvidia.com>
* Change port index in port_config.ini to 1-based * Add default port index to port_config.ini, change platform plugins to accept 1-based port index * fix port index in sfp_event.py
* New SKU support for MSN4600C Signed-off-by: Shlomi Bitton <shlomibi@mellanox.com>