[][mt7981/mt7988][eth][phy: mediatek-ge: Fix conflict default settings]

[Description]
Fix conflict default settings:
1. VgaDecRate is 1 at default on Jaguar. We don't set it again.
2. Move TR_OPEN_LOOP_EN=1, lpf_x_average = 9 to common part.
3. InhibitDisableDfeTail1000 is clear at EEE function, set it back.

[Release-log]
N/A

Change-Id: I2e46cd9fa996b91378a47d0c3d685ca767ac11a5
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7329924
1 file changed