[FS#559] No Ethernet statistics on ag71xx

[LEDE Bugs]

The following task has a new comment added:

FS#559 - No Ethernet statistics on ag71xx
User who did this - Yousong Zhou (yousong)

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Some stats will be available in debugfs when the following options are enabled


CONFIG_AG71XX_DEBUG=y
CONFIG_AG71XX_DEBUG_FS=y


But it's true that relevant ethtool interface is not implemented yet. 
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=559#comment2557