ath79: fix support for TL-WR740N/WR741N v4

1. Swap eth0/eth1
 Both devices are using AR9331, the builtin switch on AR9331 is
 connected to gmac1 and gmac1 is named as eth1 in ath79.
 PS: gmac1 is eth0 and gmac0 is eth1 in ar71xx because of the
 reversed initialization order.
2. Fix the incorrect compatible string in dts

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

target/linux/ath79/base-files/etc/board.d/01_leds

@@ -64,7 +64,7 @@ case "$board" in
 	;;
 "tplink,tl-wr741nd-v4"|\
 "tplink,tl-wr740nd-v4")
-	ucidef_set_led_netdev "wan" "WAN" "tp-link:green:wan" "eth1"
+	ucidef_set_led_netdev "wan" "WAN" "tp-link:green:wan" "eth0"
 	ucidef_set_led_switch "lan1" "LAN1" "tp-link:green:lan1" "switch0" "0x04"
 	ucidef_set_led_switch "lan2" "LAN2" "tp-link:green:lan2" "switch0" "0x08"
 	ucidef_set_led_switch "lan3" "LAN3" "tp-link:green:lan3" "switch0" "0x10"

target/linux/ath79/base-files/etc/board.d/02_network

@@ -85,9 +85,9 @@ ath79_setup_interfaces()
 
 	"tplink,tl-wr741nd-v4"|\
 	"tplink,tl-wr740nd-v4")
-		ucidef_set_interfaces_wan "eth1"
+		ucidef_set_interfaces_wan "eth0"
 		ucidef_add_switch "switch0" \
-			"0@eth0" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1"
+			"0@eth1" "1:lan:4" "2:lan:3" "3:lan:2" "4:lan:1"
 		;;
 	"tplink,tl-wr841n-v9")
 		ucidef_set_interface_wan "eth0"

target/linux/ath79/dts/ar9331_tl-wr740nd-v4.dts

@@ -5,5 +5,5 @@
 
 / {
 	model = "TP-Link TL-WR740N/ND v4";
-	compatible = "tplink,tl-wr740n-v4";
+	compatible = "tplink,tl-wr740nd-v4";
 };

target/linux/ath79/dts/ar9331_tl-wr741nd-v4.dts

@@ -5,5 +5,5 @@
 
 / {
 	model = "TP-Link TL-WR741N/ND v4";
-	compatible = "tplink,tl-wr741n-v4";
+	compatible = "tplink,tl-wr741nd-v4";
 };