[][kernel][common][eth][Update MDI Reversal feature for the Aquantia PHY driver]

[Description]
Refactor MDI Reversal feature for the Aquantia PHY driver.

Kindly determine the most suitable configuration based on the hardware
design.
1. MDI Reversed
   mdi-reversal = /bits/ 16 <1>;
2. MDI Normal
   mdi-reversal = /bits/ 16 <0>;

If without this patch, kernel cannot configure MDI Reversal of the
Aquantia PHY device by the DTS.

[Release-log]
N/A


Change-Id: I23cc00e810f1a6b37749b225eb25fe142a5b2f72
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7534218
17 files changed