[][kernel][mt7988][eth][Change AQR113C firmware download method to MDIO gangload]

[Description]
Change AQR113C firmware download method to MDIO gangload.

If without this patch, AQR113C cannot boot from MDIO gangload.

[Release-log]
N/A


Change-Id: Iddc29f5e1c73c772bcea9313938b6daccc10025a
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6781059
9 files changed