lantiq: fix indent in vr9_avm_fritz7412.dts

Indent should be tabs.

Signed-off-by: Adrian Schmutzler <[email protected]>

target/linux/lantiq/files/arch/mips/boot/dts/lantiq/vr9_avm_fritz7412.dts

@@ -178,7 +178,7 @@
 };
 
 &gphy0 {
-       lantiq,gphy-mode = <GPHY_MODE_FE>;
+	lantiq,gphy-mode = <GPHY_MODE_FE>;
 };
 
 &eth0 {