rk3368 tb: enable fiq debugger and disable the original uart console

Change the device from ttyS2 to ttyFIQ0

Change-Id: Ibc2ab1c9adf1dd5d1718c3c2d80fe578725b409a
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>

arch/arm64/boot/dts/rk3368-tb_8846.dts

@@ -14,6 +14,10 @@
 		bootargs = "earlyprintk=uart8250-32bit,0xff690000";
 	};
 
+	fiq-debugger {
+		status = "okay";
+	};
+
 	wireless-wlan {
 		compatible = "wlan-platdata";
                 rockchip,grf = <&grf>;
@@ -380,10 +384,6 @@
 	*/
 };
 
-&uart_dbg {
-	status = "okay";
-};
-
 &uart_bt {
 	status = "okay";
 	dma-names = "!tx", "!rx";