ath79: Fix mac reset and gmac compatible in ar934x.dtsi

Also add phy-mode and fixed-link as gmac1 is always connected
to the builtin switch.

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

target/linux/ath79/dts/ar934x.dtsi

@@ -135,7 +135,7 @@
 			};
 
 			gmac: gmac@18070000 {
-				compatible = "qca,ar9340-gmac", "qca,ar9330-gmac";
+				compatible = "qca,ar9340-gmac";
 				reg = <0x18070000 0x14>;
 			};
 
@@ -202,8 +202,8 @@
 	pll-reg = <0x4 0x2c 17>;
 	pll-handle = <&pll>;
 
-	resets = <&rst 8>, <&rst 9>;
-	reset-names = "mac", "phy";
+	resets = <&rst 9>;
+	reset-names = "mac";
 };
 
 &mdio1 {
@@ -215,6 +215,12 @@
 &eth1 {
 	compatible = "qca,ar9340-eth", "syscon";
 
-	resets = <&rst 12>, <&rst 13>;
-	reset-names = "mac", "phy";
+	resets = <&rst 13>;
+	reset-names = "mac";
+	phy-mode = "gmii";
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
 };