defconfig: r4: try to fix ethernet-leds (not enough yet)

Author: frank-w

arch/arm64/configs/mt7988a_bpi-r4_defconfig

@@ -836,6 +836,7 @@ CONFIG_NET_DEVLINK=y
 CONFIG_NET_DSA=y
 CONFIG_NET_DSA_MT7530=y
 CONFIG_NET_DSA_TAG_MTK=y
+CONFIG_LED_TRIGGER_PHY=y
 CONFIG_NET_FLOW_LIMIT=y
 CONFIG_NET_MEDIATEK_SOC=y
 CONFIG_NET_MEDIATEK_SOC_WED=y