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>
diff --git a/arch/arm/boot/dts/hisi-x5hd2-dkb.dts b/arch/arm/boot/dts/hisi-x5hd2-dkb.dts
index 721b092..d13af84 100644
--- a/arch/arm/boot/dts/hisi-x5hd2-dkb.dts
+++ b/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 {