[][kernel][mt7981/mt7988][eth][phy: mediatek-ge: Fix Kconfig syntax error]

[Description]
Fix Kconfig syntax error

[Release-log]
N/A

Change-Id: I658f591495c1e2aadcec3fb99d43de00a4cafa30
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7353591
1 file changed