[][Change the proprietary mdio ioctl to upstream format]

[Description]
Change the proprietary mdio ioctl to upstream format.
This patch can reduce the size of ioctl data from 28 bytes to 12 bytes.

[Release-log]
N/A

Change-Id: Ic7d5446e43c8f1078fc9bec7ee06bf2f938bca08
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4538828
3 files changed