NMC-4005 NVM upgrade from V5.05/6.01 to V6.80

1. This FAQ and nvmupgarde utility are only for Advantech NMC-4005, please don't use this utility to flash PCIE-2230/NMC-1001/NMC-1010 NVM

2. 2. Please  refer following table to check network driver version, and we recommend upgrading latest driver before upgrading NVM