ARM: hisilicon: DT: Drop console= and earlyprintk bootargs parameter

Replace console with stdout-path so that we don't have to put the
console on the kernel command line.

Remove earlyprintk to allow the kernel to boot on a system even
if DEBUG_LL is configured for another system.
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm/boot/dts/hi3620-hi4511.dts

@@ -16,7 +16,8 @@ / {
 	compatible = "hisilicon,hi3620-hi4511";
 
 	chosen {
-		bootargs = "console=ttyAMA0,115200 root=/dev/ram0 earlyprintk";
+		bootargs = "root=/dev/ram0";
+		stdout-path = "serial0:115200n8";
 	};
 
 	memory {

arch/arm/boot/dts/hisi-x5hd2-dkb.dts

@@ -15,7 +15,7 @@ / {
 	compatible = "hisilicon,hix5hd2";
 
 	chosen {
-		bootargs = "console=ttyAMA0,115200 earlyprintk";
+		stdout-path = "serial0:115200n8";
 	};
 
 	cpus {