mvebu: clearfog: document interface configuration

Take explicit note of what physical ports eth{0,1,2} refer to.
Also repair port assignment:
At some point between 4.9.20 and 4.9.29 the numbering changed.
Keep previous port assignment that was:
LAN = SFP+Switch
WAN = standalone ethernet

Also use the same assignment for Clearfog-Base to avoid confusion.

Signed-off-by: Josua Mayer <josua.mayer97@gmail.com>

target/linux/mvebu/base-files/etc/board.d/02_network

@@ -27,14 +27,17 @@ armada-385-db-ap)
 armada-xp-gp)
 	ucidef_set_interface_lan "eth0 eth1 eth2 eth3"
 	;;
-armada-388-clearfog-pro)
-	ucidef_set_interfaces_lan_wan "eth0 eth1" "eth2"
+armada-388-clearfog-*)
+	# eth0 is standalone ethernet
+	# eth1 is switch (-pro) or standalone ethernet (-base)
+	# eth2 is SFP
+	ucidef_set_interfaces_lan_wan "eth1 eth2" "eth0"
+
+	# if switch exists (clearfog-pro)
+	# switch port 5 is connected to eth1
 	swconfig list 2>&1 | grep -q switch0 && \
 		ucidef_add_switch "switch0" \
-			"0:lan:5" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1" "5u@eth0" "6:lan:6"
-	;;
-armada-388-clearfog-base)
-	ucidef_set_interfaces_lan_wan "eth0" "eth1"
+			"0:lan:5" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1" "5u@eth1" "6:lan:6"
 	;;
 *)
 	ucidef_set_interface_lan "eth0"