[FS#240] Replace old igb kernel drivers with updated Intel drivers

[LEDE Bugs]

The following task has a new comment added:

FS#240 - Replace old igb kernel drivers with updated Intel drivers
User who did this - Jo-Philipp Wich (jow-)

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Is there any specific reason to use these drivers?
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=240#comment690