[][kernel][mt7981][eth][Fix issue of GMAC RX hanging when internal GPHY connect to a legacy 10M/Half hub]

[Description]
Fix issue of GMAC RX hanging when internal GPHY connect to a legacy
10M/Half hub.

Without this patch, the GMAC RX direction might be stalled due to
irregular short packets.

[Release-log]
N/A


Change-Id: I89b61fddf538e8035df86e5124e00b7b693321a5
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8821447
2 files changed